c. 33: First Christian Pentecost; descent of the Holy Spirit upon the disciples; preaching of St. Peter in Jerusalem; conversion, baptism and aggregation of some 3,000 persons to the first Christian community.

St. Stephen, deacon, was stoned to death at Jerusalem; he is venerated as the first Christian martyr.

c. 34: St. Paul, formerly Saul the persecutor of Christians, was converted and baptized. After three years of solitude in the desert, he joined the college of the apostles; he made three major missionary journeys and became known as the Apostle to the Gentiles; he was imprisoned twice in Rome and was beheaded there between 64 and 67.

39: Cornelius (the Gentile) and his family were baptized by St. Peter; a significant event signaling the mission of the Church to all peoples.

42: Persecution of Christians in Palestine broke out during the rule of Herod Agrippa; St. James the Greater, the first apostle to die, was beheaded in 44; St. Peter was imprisoned for a short time; many Christians fled to Antioch, marking the beginning of the dispersion of Christians beyond the confines of Palestine. At Antioch, the followers of Christ were called Christians for the first time.

49:  Christians at Rome, considered members of a Jewish sect, were adversely affected by a decree of Claudius which forbade Jewish worship there.

51: The Council of Jerusalem, in which all the apostles participated under the presidency of St. Peter, decreed that circumcision, dietary regulations, and various other prescriptions of Mosaic Law were not obligatory for Gentile converts to the Christian community. The crucial decree was issued in opposition to Judaizers who contended that observance of the Mosaic Law in its entirety was necessary for salvation.

64: Persecution broke out at Rome under Nero, the emperor said to have accused Christians of starting the fire which destroyed half of Rome.

64 or 67: Martyrdom of St. Peter at Rome during the Neronian persecution. He established his see and spent his last years there after preaching in and around Jerusalem, establishing a see at Antioch, and presiding at the Council of Jerusalem.

70: Destruction of Jerusalem by Titus.

88-97: Pontificate of St. Clement I, third successor of St. Peter as bishop of Rome, one of the Apostolic Fathers. The First Epistle of Clement to the Corinthians, with which he has been identified, was addressed by the Church of Rome to the Church at Corinth, the scene of irregularities and divisions in the Christian community.

95: Domitian persecuted Christians, principally at Rome.

c. 100: Death of St. John, apostle and evangelist, marking the end of the Age of the Apostles and the first generation of the Church.

By the end of the century, Antioch, Alexandria and Ephesus in the East and Rome in the West were established centers of Christian population and influence.

c. 107: St. Ignatius of Antioch was martyred at Rome. He was the first writer to use the expression, “the Catholic Church.”

112: Emperor Trajan, in a rescript to Pliny the Younger, governor of Bithynia, instructed him not to search out Christians but to punish them if they were publicly denounced and refused to do homage to the Roman gods. This rescript set a pattern for Roman magistrates in dealing with Christians.

117-38: Persecution under Hadrian. Many Acts of Martyrs date from this period.

c. 125: Spread of Gnosticism, a combination of elements of Platonic philosophy and Eastern mystery religions. Its adherents claimed that its secret-knowledge principle provided a deeper insight into Christian doctrine than divine revelation and faith. One gnostic thesis denied the divinity of Christ; others denied the reality of his humanity, calling it mere appearance (Docetism, Phantasiasm).

c. 144: Excommunication of Marcion, bishop and heretic, who claimed that there was total opposition and no connection at all between the Old Testament and the New Testament, between the God of the Jews and the God of the Christians; and that the Canon (list of inspired writings) of the Bible consisted only of parts of St. Luke’s Gospel and 10 letters of St. Paul. Marcionism was checked at Rome by 200 and was condemned by a council held there about 260, but the heresy persisted for several centuries in the East and had some adherents as late as the Middle Ages.

c. 155: St. Polycarp, bishop of Smyrna and disciple of St. John the Evangelist, was martyred.

c. 156: Beginning of Montanism, a form of religious extremism. Its principal tenets were the imminent second coming of Christ, denial of the divine nature of the Church and its power to forgive sin, and excessively rigorous morality. The heresy, preached by Montanus of Phrygia and others, was condemned by Pope St. Zephyrinus (199-217).

161-80: Reign of Marcus Aurelius. His persecution, launched in the wake of natural disasters, was more violent than those of his predecessors.

165: St. Justin, an important early Christian writer, was martyred at Rome.

c. 180: St. Irenaeus, bishop of Lyons and one of the great early theologians, wrote Adversus Haereses. He stated that the teaching and tradition of the Roman See was the standard for belief.

196:  Easter Controversy, concerning the day of celebration — a Sunday, according to practice in the West, or the 14th of the month of Nisan (in the Hebrew calendar), no matter what day of the week, according to practice in the East. The controversy was not resolved at this time.

The Didache, whose extant form dates from the second century, is an important record of Christian belief, practice and governance in the first century.

Latin was introduced as a liturgical language in the West. Other liturgical languages were Aramaic and Greek.

The Catechetical School of Alexandria, founded about the middle of the century, gained increasing influence on doctrinal study and instruction, and interpretation of the Bible.

202: Persecution under Septimius Severus, who wanted to establish a simple common religion in the Empire.

206: Tertullian, a convert since 197 and the first great ecclesiastical writer in Latin, joined the heretical Montanists; he died in 230.

215: Death of Clement of Alexandria, teacher of Origen and a founding father of the School of Alexandria.

217-35: St. Hippolytus, the first antipope; he was reconciled to the Church while in prison during persecution in 235.

232-54: Origen established the School of Caesarea after being deposed in 231 as head of the School of Alexandria; he died in 254. A scholar and voluminous writer, he was one of the founders of systematic theology and exerted wide influence for many years.

c. 242: Manichaeism originated in Persia: a combination of errors based on the assumption that two supreme principles (good and evil) are operative in creation and life, and that the supreme objective of human endeavor is liberation from evil (matter). The heresy denied the humanity of Christ, the sacramental system, the authority of the Church (and state), and endorsed a moral code which threatened the fabric of society. In the 12th and 13th centuries, it took on the features of Albigensianism and Catharism.

249-51: Persecution under Decius. Many of those who denied the faith (lapsi) sought readmission to the Church at the end of the persecution in 251. Pope St. Cornelius agreed with St. Cyprian that lapsi were to be readmitted to the Church after satisfying the requirements of appropriate penance. Antipope Novatian, on the other hand, contended that persons who fell away from the Church under persecution and/or those guilty of serious sin after baptism could not be absolved and readmitted to communion with the Church. The heresy was condemned by a Roman synod in 251.

250-300: Neo-Platonism of Plotinus and Porphyry gained followers.

251: Novatian, an antipope, was condemned at Rome.

256: Pope St. Stephen I upheld the validity of baptism properly administered by heretics, in the Rebaptism Controversy.

257: Persecution under Valerian, who attempted to destroy the Church as a social structure.

258: St. Cyprian, bishop of Carthage, was martyred.

c. 260: St. Lucian founded the School of Antioch, a center of influence on biblical studies.

Pope St. Dionysius condemned Sabellianism, a form of modalism (like Monarchianism and Patripassianism). The heresy contended that the Father, Son and Holy Spirit are not distinct divine persons but are only three different modes of being and self-manifestations of the one God.

St. Paul of Thebes became a hermit.

261: Gallienus issued an edict of toleration which ended general persecution for nearly 40 years.

c. 292: Diocletian divided the Roman Empire into East and West. The division emphasized political, cultural and other differences between the two parts of the Empire and influenced different developments in the Church in the East and West. The prestige of Rome began to decline.

303: Persecution broke out under Diocletian; it was particularly violent in 304.

305: St. Anthony of Heracles established a foundation for hermits near the Red Sea in Egypt.

c. 306: The first local legislation on clerical celibacy was enacted by a council held at Elvira, Spain; bishops, priests, deacons and other ministers were forbidden to have wives.

311: An edict of toleration issued by Galerius at the urging of Constantine the Great and Licinius officially ended persecution in the West; some persecution continued in the East.

313: The Edict of Milan issued by Constantine and Licinius recognized Christianity as a lawful religion in the Roman Empire.

314: A council of Arles condemned Donatism, declaring that baptism properly administered by heretics is valid, in view of the principle that sacraments have their efficacy from Christ, not from the spiritual condition of their human ministers. The heresy was condemned again by a council of Carthage in 411.

318: St. Pachomius established the first foundation of the cenobitic (common) life, as compared with the solitary life of hermits in Upper Egypt.

325: Ecumenical Council of Nicaea (I). Its principal action was the condemnation of Arianism, the most devastating of the early heresies, which denied the divinity of Christ. The heresy was authored by Arius of Alexandria, a priest. Arians and several kinds of Semi-Arians propagandized their tenets widely, established their own hierarchies and churches, and raised havoc in the Church for several centuries. The council contributed to formulation of the Nicene Creed (Creed of Nicaea-Constantinople); fixed the date for the observance of Easter; passed regulations concerning clerical discipline; adopted the civil divisions of the Empire as the model for the jurisdictional organization of the Church.

326: With the support of St. Helena, the True Cross on which Christ was crucified was discovered.

337:Baptism and death of Constantine.

c. 342: Beginning of a 40-year persecution in Persia.

343-44: A council of Sardica reaffirmed doctrine formulated by Nicaea I and declared also that bishops had the right of appeal to the pope as the highest authority in the Church.

361-63: Emperor Julian the Apostate waged an unsuccessful campaign against the Church in an attempt to restore paganism as the religion of the Empire.

c. 365: Persecution of orthodox Christians under Emperor Valens in the East.

c. 376: Beginning of the barbarian invasion in the West.

379: Death of St. Basil, the Father of Monasticism in the East. His writings contributed greatly to the development of rules for the life of Religious.

381: Ecumenical Council of Constantinople (I). It condemned various brands of Arianism as well as Macedonianism, which denied the divinity of the Holy Spirit; contributed to formulation of the Nicene Creed; approved a canon acknowledging Constantinople as the second see after Rome in honor and dignity.

382: The Canon of Sacred Scripture, the official list of the inspired books of the Bible, was contained in the Decree of Pope St. Damasus and published by a regional council of Carthage in 397; the Canon was formally defined by the Council of Trent in the 16th century.

382-c. 406: St. Jerome translated the Old and New Testaments into Latin; his work is called the Vulgate version of the Bible.

396: St. Augustine became bishop of Hippo in North Africa.

410: Visigoths under Alaric sacked Rome and the last Roman legions departed Britain. The decline of imperial Rome dates approximately from this time.

430: St. Augustine, bishop of Hippo for 35 years, died. He was a strong defender of orthodox doctrine against Manichaeism, Donatism and Pelagianism. The depth and range of his writings made him a dominant influence in Christian thought for centuries.

431: Ecumenical Council of Ephesus. It condemned Nestorianism, which denied the unity of the divine and human natures in the Person of Christ; defined Theotokos (Bearer of God) as the title of Mary, Mother of the Son of God made Man; condemned Pelagianism. The heresy of Pelagianism, proceeding from the assumption that Adam had a natural right to supernatural life, held that man could attain salvation through the efforts of his natural powers and free will; it involved errors concerning the nature of original sin, the meaning of grace and other matters. Related Semi-Pelagianism was condemned by a council of Orange in 529.

432: St. Patrick arrived in Ireland. By the time of his death in 461 most of the country had been converted, monasteries founded and the hierarchy established.

438: The Theodosian Code, a compilation of decrees for the Empire, was issued by Theodosius II; it had great influence on subsequent civil and ecclesiastical law.

451: Ecumenical Council of Chalcedon. Its principal action was the condemnation of Mono-physitism (also called Eutychianism), which denied the humanity of Christ by holding that he had only one, the divine, nature.

452: Pope St. Leo the Great persuaded Attila the Hun to spare Rome.

455: Vandals under Geiseric sacked Rome.

484: Patriarch Acacius of Constantinople was excommunicated for signing the Henoticon, a document which capitulated to the Monophysite heresy. The excommunication triggered the Acacian Schism which lasted for 35 years.

494: Pope St. Gelasius I declared in a letter to Emperor Anastasius that the pope had power and authority over the emperor in spiritual matters.

496: Clovis, King of the Franks, was converted and became the defender of Christianity in the West.  The Franks became a Catholic people.

520: Irish monasteries flourished as centers for spiritual life, missionary training, and scholarly activity.

529: The Second Council of Orange condemned Semi-Pelagianism.

c. 529: St. Benedict founded the Monte Cassino Abbey. Some years before his death in 543 he wrote a monastic rule which exercised tremendous influence on the form and style of religious life. He is called the Father of Monasticism in the West.

533: John II became the first pope to change his name. The practice did not become general until the time of Sergius IV (1009).

533-34: Emperor Justinian promulgated the Corpus Iuris Civilis for the Roman world; like the Theodosian Code, it influenced subsequent civil and ecclesiastical law.

c. 545: Death of Dionysius Exiguus who was the first to date history from the birth of Christ, a practice which resulted in use of the B.C. and A.D. abbreviations. His calculations were at least four years late.

553:  Ecumenical Council of Constantinople (II). It condemned the Three Chapters, Nestorian-tainted writings of Theodore of Mopsuestia, Theodoret of Cyrus and Ibas of Edessa.

585: St. Columban founded an influential monastic school at Luxeuil.

589: The most important of several councils of Toledo was held. The Visigoths renounced Arianism, and St. Leander began the organization of the Church in Spain.

590-604: Pontificate of Pope St. Gregory I the Great. He set the form and style of the papacy which prevailed throughout the Middle Ages; exerted great influence on doctrine and liturgy; was strong in support of monastic discipline and clerical celibacy; authored writings on many subjects. Gregorian Chant is named in his honor.

596:Pope St. Gregory I sent St. Augustine of Canterbury and 40 monks to do missionary work in England.

597: St. Columba died. He founded an important monastery at Iona, established schools and did notable missionary work in Scotland. By the end of the century, monasteries of nuns were common; Western monasticism was flourishing; monasticism in the East, under the influence of Monophysitism and other factors, was losing its vigor.

613:St. Columban established the influential monastery of Bobbio in northern Italy; he died there in 615.

622: The Hegira (flight) of Mohammed from Mecca to Medina signalled the beginning of Islam which, by the end of the century, claimed almost all of the southern Mediterranean area.

628: Heraclius, Eastern Emperor, recovered the True Cross from the Persians.

649: A Lateran council condemned two erroneous formulas (Ecthesis and Type) issued by emperors Heraclius and Constans II as means of reconciling Monophysites with the Church.

664: Actions of the Synod of Whitby advanced the adoption of Roman usages in England, especially regarding the date for the observance of Easter. (See Easter Controversy.)

680-81: Ecumenical Council of Constantinople (III). It condemned Monothelitism, which held that Christ had only one will, the divine; censured Pope Honorius I for a letter to Sergius, bishop of Constantinople, in which he made an ambiguous but not infallible statement about the unity of will and/or operation in Christ.

692: Trullan Synod. Eastern-Church discipline on clerical celibacy was settled, permitting marriage before ordination to the diaconate and continuation in marriage afterwards, but prohibiting marriage following the death of the wife thereafter. Anti-Roman canons contributed to East-West alienation.

During the century, the monastic influence of Ireland and England increased in Western Europe; schools and learning declined; regulations regarding clerical celibacy became more strict in the East.

711: Muslims began the conquest of Spain.

726:  Emperor Leo III, the Isaurian, launched a campaign against the veneration of sacred images and relics; called Iconoclasm (image-breaking), it caused turmoil in the East until about 843.

731: Pope Gregory III and a synod at Rome condemned Iconoclasm, with a declaration that the veneration of sacred images was in accord with Catholic tradition.

Venerable Bede issued his Ecclesiastical History of the English People.

732: Charles Martel defeated the Muslims at Poitiers, halting their advance in the West.

744: The Monastery of Fulda was established by St. Sturmi, a disciple of St. Boniface; it was influential in the evangelization of Germany.

754: A council of more than 300 Byzantine bishops endorsed Iconoclast errors. This council and its actions were condemned by the Lateran synod of 769.

Stephen II (III) crowned Pepin ruler of the Franks. Pepin twice invaded Italy, in 754 and 756, to defend the pope against the Lombards. His land grants to the papacy, called the Donation of Pepin, were later extended by Charlemagne (773) and formed part of the States of the Church.

c. 755: St. Boniface (Winfrid) was martyred. He was called the Apostle of Germany for his missionary work and organization of the hierarchy there.

781: Alcuin was chosen by Charlemagne to organize a palace school, which became a center of intellectual leadership.

787: Ecumenical Council of Nicaea (II). It condemned Iconoclasm, which held that the use of images was idolatry, and Adoptionism, which claimed that Christ was not the Son of God by nature but only by adoption. This was the last council regarded as ecumenical by Orthodox Churches.

792: A council at Ratisbon condemned Adoptionism.

The famous Book of Kells (“The Great Gospel of Columcille”) dates from the early eighth or late seventh century.

800: Charlemagne was crowned Emperor by Pope Leo III on Christmas Day.

Egbert became king of West Saxons; he unified England and strengthened the See of Canterbury.

813: Emperor Leo V, the Armenian, revived Iconoclasm, which persisted until about 843.

814: Charlemagne died.

843: The Treaty of Verdun split the Frankish kingdom among Charlemagne’s three grandsons.

844: A Eucharistic controversy involving the writings of St. Paschasius Radbertus, Ratramnus and Rabanus Maurus occasioned the development of terminology regarding the doctrine of the Real Presence.

846: Muslims invaded Italy and attacked Rome.

847-52: Period of composition of the False Decretals, a collection of forged documents attributed to popes from St. Clement (88-97) to Gregory II (714-731). The Decretals, which strongly supported the autonomy and rights of bishops, were suspect for a long time before being repudiated entirely about 1628.

848: The Council of Mainz condemned Gottschalk for heretical teaching regarding predestination. He was also condemned by the Council of Quierzy in 853.

857: Photius displaced Ignatius as patriarch of Constantinople. This marked the beginning of the Photian Schism, a confused state of East-West relations which has not yet been cleared up by historical research. Photius, a man of exceptional ability, died in 891.

865: St. Ansgar, apostle of Scandinavia, died.

869: St. Cyril died and his brother, St. Methodius (d. 885), was ordained a bishop. The Apostles of the Slavs devised an alphabet and translated the Gospels and liturgy into the Slavonic language.

869-70: Ecumenical Council of Constantinople (IV). It issued a second condemnation of Iconoclasm, condemned and deposed Photius as patriarch of Constantinople and restored Ignatius to the patriarchate. This was the last ecumenical council held in the East. It was first called ecumenical by canonists toward the end of the 11th century.

871-c. 900: Reign of Alfred the Great, the only English king ever anointed by a pope at Rome.

910: William, duke of Aquitaine, founded the Benedictine Abbey of Cluny, which became a center of monastic and ecclesiastical reform, especially in France.

915: Pope John X played a leading role in the expulsion of Saracens from central and southern Italy.

955: St. Olga, of the Russian royal family, was baptized.

962: Otto I, the Great, crowned by Pope John XII, revived Charlemagne’s kingdom, which became the Holy Roman Empire.

966: Mieszko, first of a royal line in Poland, was baptized; he brought Latin Christianity to Poland.

988: Conversion and baptism of St. Vladimir and the people of Kiev which subsequently became part of Russia.

993: John XV was the first pope to decree the official canonization of a saint — Bishop Ulrich (Uldaric) of Augsburg — for the universal Church.

997: St. Stephen became ruler of Hungary. He assisted in organizing the hierarchy and establishing Latin Christianity in that country.

999-1003: Pontificate of Sylvester II (Gerbert of Aquitaine), a Benedictine monk and the first French pope.

1009: Beginning of lasting East-West Schism in the Church, marked by dropping of the name of Pope Sergius IV from the Byzantine diptychs (the listing of persons prayed for during the liturgy). The deletion was made by Patriarch Sergius II of Constantinople.

1012: St. Romuald founded the Camaldolese Hermits.

1025: The Council of Arras, and other councils later, condemned the Cathari (Neo-Manichaeans, Albigenses).

1027: The Council of Elne proclaimed the Truce of God as a means of stemming violence; it involved armistice periods of varying length, which were later extended.

1038: St. John Gualbert founded the Vallombrosians.

1043-59: Constantinople patriarchate of Michael Cerularius, the key figure in a controversy concerning the primacy of the papacy. His and the Byzantine synod’s refusal to acknowledge this primacy in 1054 widened and hardened the East-West Schism in the Church.

1047: Pope Clement II died; he was the only pope ever buried in Germany.

1049-54: Pontificate of St. Leo IX, who inaugurated a movement of papal, diocesan, monastic and clerical reform.

1054: Start of the Great Schism between the Eastern and Western Churches; it marked the separation of Orthodox Churches from unity with the pope.

1055: Condemnation of the Eucharistic doctrine of Berengarius.

1059: A Lateran council issued new legislation regarding papal elections; voting power was entrusted to the Roman cardinals.

1066: Death of St. Edward the Confessor, king of England from 1042 and restorer of Westminster Abbey.

Defeat, at Hastings, of Harold by William, Duke of Normandy (later William I), who subsequently exerted strong influence on the life-style of the Church in England.

1073-85: Pontificate of St. Gregory VII (Hildebrand). A strong pope, he carried forward programs of clerical and general ecclesiastical reform and struggled against German King Henry IV and other rulers to end the evils of lay investiture. He introduced the Latin liturgy in Spain and set definite dates for the observance of ember days.

1077: Henry IV, excommunicated and suspended from the exercise of imperial powers by Gregory VII, sought absolution from the pope at Canossa. Henry later repudiated this action and in 1084 forced Gregory to leave Rome.

1079: The Council of Rome condemned Eucharistic errors (denial of the Real Presence of Christ under the appearances of bread and wine) of Berengarius, who retracted.

1084: St. Bruno founded the Carthusians.

1097-99: The first of several Crusades undertaken between this time and 1265. Recovery of the Holy Places and gaining free access to them for Christians were the original purposes, but these were diverted to less worthy objectives in various ways. Results included: a Latin Kingdom of Jerusalem, 1099-1187; a military and political misadventure in the form of a Latin Empire of Constantinople, 1204-1261; acquisition, by treaties, of visiting rights for Christians in the Holy Land. East-West economic and cultural relationships increased during the period. In the religious sphere, actions of the Crusaders had the effect of increasing the alienation of the East from the West.

1098: St. Robert founded the Cistercians.

1108: Beginnings of the influential Abbey and School of St. Victor in France.

1115: St. Bernard established the Abbey of Clairvaux and inaugurated the Cistercian Reform.

1118: Christian forces captured Saragossa, Spain; the beginning of the Muslim decline in that country.

1121: St. Norbert established the original monastery of the Praemonstratensians near Laon, France.

1122: The Concordat of Worms (Pactum Callixtinum) was formulated and approved by Pope Callistus II and Emperor Henry V to settle controversy concerning the investiture of prelates. The concordat provided that the emperor could invest prelates with symbols of temporal authority but had no right to invest them with spiritual authority, which came from the Church alone, and that the emperor was not to interfere in papal elections. This was the first concordat in history.

1123: Ecumenical Council of the Lateran (I), the first of its kind in the West. It endorsed provisions of the Concordat of Worms concerning the investiture of prelates and approved reform measures in 25 canons.

1139: Ecumenical Council of the Lateran (II). It adopted measures against a schism organized by antipope Anacletus and approved 30 canons related to discipline and other matters; one of the canons stated that holy orders is an invalidating impediment to marriage.

1140: St. Bernard met Abelard in debate at the Council of Sens. Abelard, whose rationalism in theology was condemned for the first time in 1121, died in 1142 at Cluny.

1148: The Synod of Rheims enacted strict disciplinary decrees for communities of women Religious.

1152: The Synod of Kells reorganized the Church in Ireland.

1160: Gratian, whose Decretum became a basic text of canon law, died.

Peter Lombard, compiler of the Four Books of Sentences, a standard theology text for nearly 200 years, died.

1170: St. Thomas Becket, archbishop of Canterbury, who clashed with Henry II over church-state relations, was murdered in his cathedral.

1171: Pope Alexander III reserved the process of canonization of saints to the Holy See.

1179: Ecumenical Council of the Lateran (III). It enacted measures against Waldensianism and Albigensianism (see year 242 regarding Manichaeism), approved reform decrees in 27 canons, provided that popes be elected by a two-thirds vote of the cardinals.

1184: Waldenses and other heretics were excommunicated by Pope Lucius III.

1198-1216: Pontificate of Innocent III, during which the papacy reached its medieval peak of authority, influence and prestige in the Church and in relations with civil rulers.

1208: Innocent III called for a crusade, the first in Christendom itself, against the Albigensians; their beliefs and practices threatened the fabric of society in southern France and northern Italy.

1209: Verbal approval was given by Innocent III to a rule of life for the Order of Friars Minor, started by St. Francis of Assisi.

1212: The Second Order of Franciscans, the Poor Clares, was founded.

1215: Ecumenical Council of the Lateran (IV). It ordered annual reception of the sacraments of penance and the Eucharist; defined and made the first official use of the term transubstantiation to explain the change of bread and wine into the body and blood of Christ; adopted additional measures to counteract teachings and practices of the Albigensians and Cathari; approved 70 canons.

1216: Formal papal approval was given to a rule of life for the Order of Preachers, started by St. Dominic.

The Portiuncula Indulgence was granted by the Holy See at the request of St. Francis of Assisi.

1221: Rule of the Third Order Secular of St. Francis (Secular Franciscan Order) approved verbally by Honorius III.

1226: Death of St. Francis of Assisi.

1231: Pope Gregory IX authorized establishment of the Papal Inquisition for dealing with heretics. It was a creature of its time, when crimes against faith and heretical doctrines of extremists like the Cathari and Albigenses threatened the good of the Christian community, the welfare of the state and the very fabric of society. The institution, which was responsible for excesses in punishment, was most active in the second half of the century in southern France, Italy and Germany.

1245: Ecumenical Council of Lyons (I). It confirmed the deposition of Emperor Frederick II and approved 22 canons.

1247: Preliminary approval was given by the Holy See to a Carmelite rule of life.

1270: St. Louis IX, king of France, died.

Beginning of papal decline.

1274: Ecumenical Council of Lyons (II). It accomplished a temporary reunion of separated Eastern Churches with the Roman Church; issued regulations concerning conclaves for papal elections; approved 31 canons.

Death of St. Thomas Aquinas, Doctor of the Church, of lasting influence.

1280: Pope Nicholas III, who made the Breviary the official prayer book for clergy of the Roman Church, died.

1281: The excommunication of Michael Palaeologus by Pope Martin IV ruptured the union effected with the Eastern Church in 1274.

1302: Pope Boniface VIII issued the bull Unam Sanctam, concerning the unity of the Church and the temporal power of princes, against the background of a struggle with Philip IV of France; it was the most famous medieval document on the subject.

1309-77: For a period of approximately 70 years, seven popes resided at Avignon because of unsettled conditions in Rome and other reasons; see separate entry.

1311-12: Ecumenical Council of Vienne. It suppressed the Knights Templar and enacted a number of reform decrees.

1321: Dante Alighieri died a year after completing the Divine Comedy.

1324: Marsilius of Padua completed Defensor Pacis, a work condemned by Pope John XXII as heretical because of its denial of papal primacy and the hierarchical structure of the Church, and for other reasons. It was a charter for conciliarism (an ecumenical council is superior to the pope in authority).

1337-1453: Period of the Hundred Years’ War, a dynastic struggle between France and England.

1338: Four years after the death of Pope John XXII, who had opposed Louis IV of Bavaria in a years-long controversy, electoral princes declared at the Diet of Rhense that the emperor did not need papal confirmation of his title and right to rule. Charles IV later (1356) said the same thing in a Golden Bull, eliminating papal rights in the election of emperors.

1347-50: The Black Death swept across Europe, killing perhaps one-fourth to one-third of the total population; an estimated 40 per cent of the clergy succumbed.

1374: Petrarch, poet and humanist, died.

1377: Return of the papacy from Avignon to Rome.

Beginning of the Western Schism

1409: The Council of Pisa, without canonical authority, tried to end the Western Schism but succeeded only in complicating it by electing a third claimant to the papacy; see Western Schism.

1414-18: Ecumenical Council of Constance. It took successful action to end the Western Schism involving rival claimants to the papacy; rejected the teachings of Wycliff; condemned Hus as a heretic. One decree — passed in the earlier stages of the council but later rejected — asserted the superiority of an ecumenical council over the pope (conciliarism).

1431: St. Joan of Arc was burned at the stake.

1431-45: Ecumenical Council of Florence (also called Basle-Ferrara-Florence). It affirmed the primacy of the pope against the claims of conciliarists that an ecumenical council is superior to the pope. It also formulated and approved decrees of union with several separated Eastern Churches — Greek, Armenian, Jacobite — which failed to gain general or lasting acceptance.

1438: The Pragmatic Sanction of Bourges was enacted by Charles VII and the French Parliament to curtail papal authority over the Church in France, in the spirit of conciliarism. It found expression in Gallicanism and had effects lasting at least until the French Revolution.

1453: The fall of Constantinople to the Muslims.

c. 1456: Gutenberg issued the first edition of the Bible printed from movable type, at Mainz, Germany.

1476: Pope Sixtus IV approved observance of the feast of the Immaculate Conception on Dec. 8 throughout the Church.

1478: Pope Sixtus IV, at the urging of King Ferdinand of Spain, approved establishment of the Spanish Inquisition for dealing with Jewish and Moorish converts accused of heresy. The institution, which was peculiar to Spain and its colonies in America, acquired jurisdiction over other cases as well and fell into disrepute because of its procedures, cruelty and the manner in which it served the Spanish crown, rather than the accused and the good of the Church. Protests by the Holy See failed to curb excesses of the Inquisition, which lingered in Spanish history until early in the 19th century.

1492: Columbus discovered the Americas.

1493: Pope Alexander VI issued a Bull of Demarcation which determined spheres of influence for the Spanish and Portuguese in the Americas.

The Renaissance, a humanistic movement which originated in Italy in the 14th century, spread to France, Germany, the Low Countries and England. A transitional period between the medieval world and the modern secular world, it introduced profound changes which affected literature and the other arts, general culture, politics and religion.

1512-17: Ecumenical Council of the Lateran (V). It stated the relation and position of the pope with respect to an ecumenical council; acted to counteract the Pragmatic Sanction of Bourges and exaggerated claims of liberty by the Church in France; condemned erroneous teachings concerning the nature of the human soul; stated doctrine concerning indulgences. The council reflected concern for abuses in the Church and the need for reforms but failed to take decisive action in the years immediately preceding the Reformation.

1517: Martin Luther signaled the beginning of the Reformation by posting 95 theses at Wittenberg. Subsequently, he broke completely from doctrinal orthodoxy in discourses and three published works (1519 and 1520); was excommunicated on more than 40 charges of heresy (1521); remained the dominant figure in the Reformation in Germany until his death in 1546.

1519: Zwingli triggered the Reformation in Zurich and became its leading proponent there until his death in combat in 1531.

1524: Luther’s encouragement of German princes in putting down the two-year Peasants’ Revolt gained political support for his cause.

1528: The Order of Friars Minor Capuchin was approved as an autonomous division of the Franciscan Order; like the Jesuits, the Capuchins became leaders in the Counter-Reformation.

1530: The Augsburg Confession of Lutheran faith was issued; it was later supplemented by the Smalkaldic Articles, approved in 1537.

1533: Henry VIII divorced Catherine of Aragon, married Anne Boleyn, was excommunicated. In 1534 he decreed the Act of Supremacy, making the sovereign the head of the Church in England, under which Sts. John Fisher and Thomas More were executed in 1535. Despite his rejection of papal primacy and actions against monastic life in England, he generally maintained doctrinal orthodoxy until his death in 1547.

1536: John Calvin, leader of the Reformation in Switzerland until his death in 1564, issued the first edition of Institutes of the Christian Religion, which became the classical text of Reformed (non-Lutheran) theology.

1540: The constitutions of the Society of Jesus (Jesuits), founded by St. Ignatius of Loyola, were approved.

1541: Start of the 11-year career of St. Francis Xavier as a missionary to the East Indies and Japan.

1545-63: Ecumenical Council of Trent. It issued a great number of decrees concerning doctrinal matters opposed by the Reformers, and mobilized the Counter-Reformation. Definitions covered the Canon of the Bible, the rule of faith, the nature of justification, grace, faith, original sin and its effects, the seven sacraments, the sacrificial nature of the Mass, the veneration of saints, use of sacred images, belief in purgatory, the doctrine of indulgences, the jurisdiction of the pope over the whole Church. It initiated many reforms for renewal in the liturgy and general discipline in the Church, the promotion of religious instruction, the education of the clergy through the foundation of seminaries, etc. Trent ranks with Vatican II as the greatest ecumenical council held in the West.

1549: The first Anglican Book of Common Prayer was issued by Edward VI. Revised editions were published in 1552, 1559 and 1662 and later.

1553: Start of the five-year reign of Mary Tudor who tried to counteract actions of Henry VIII against the Roman Church.

1555: Enactment of the Peace of Augsburg, an arrangement of religious territorialism rather than toleration, which recognized the existence of Catholicism and Lutheranism in the German Empire and provided that citizens should adopt the religion of their respective rulers.

1558: Beginning of the reign (to 1603) of Queen Elizabeth I of England and Ireland, during which the Church of England took on its definitive form.

1559: Establishment of the hierarchy of the Church of England, with the consecration of Matthew Parker as archbishop of Canterbury.

1563: The first text of the 39 Articles of the Church of England was issued. Also enacted were a new Act of Supremacy and Oath of Succession to the English throne.

1570: Elizabeth I was excommunicated. Penal measures against Catholics subsequently became more severe.

1571: Defeat of the Turkish armada at Lepanto staved off the invasion of Eastern Europe.

1577: The Formula of Concord, the classical statement of Lutheran faith, was issued; it was, generally, a Lutheran counterpart of the canons of the Council of Trent. In 1580, along with other formulas of doctrine, it was included in the Book of Concord.

1582: The Gregorian Calendar, named for Pope Gregory XIII, was put into effect and was eventually adopted in most countries: England delayed adoption until 1752.

1605: The Gunpowder Plot, an attempt by Catholic fanatics to blow up James I of England and the houses of Parliament, resulted in an anti-Catholic Oath of Allegiance.

1610: Death of Matteo Ricci, outstanding Jesuit missionary to China, pioneer in cultural relations between China and Europe.

Founding of the first community of Visitation Nuns by Sts. Francis de Sales and Jane de Chantal.

1611: Founding of the Oratorians.

1613: Catholics were banned from Scandinavia.

1625: Founding of the Congregation of the Mission (Vincentians) by St. Vincent de Paul. He founded the Sisters of Charity in 1633.

1642: Death of Galileo, scientist, who was censured by the Congregation of the Holy Office for supporting the Copernican theory of the sun-centered planetary system. The case against him was closed in his favor in 1992.

Founding of the Sulpicians by Jacques Olier.

1643: Start of publication of the Bollandist Acta Sanctorum, a critical work on lives of the saints.

1648: Provisions in the Peace of Westphalia, ending the Thirty Years’ War, extended terms of the Peace of Augsburg (1555) to Calvinists and gave equality to Catholics and Protestants in the 300 states of the Holy Roman Empire.

1649: Oliver Cromwell invaded Ireland and began a severe persecution of the Church there.

1653: Pope Innocent X condemned five propositions of Jansenism, a complex theory which distorted doctrine concerning the relations between divine grace and human freedom. Jansenism was also a rigoristic movement which seriously disturbed the Church in France, the Low Countries and Italy in this and the 18th century.

1673: The Test Act in England barred from public office Catholics who would not deny the doctrine of transubstantiation and receive Communion in the Church of England.

1678: Many English Catholics suffered death as a consequence of the Popish Plot, a false allegation by Titus Oates that Catholics planned to assassinate Charles II, land a French army in the country, burn London, and turn over the government to the Jesuits.

1682: The four Gallican articles, drawn up by Bossuet, asserted political and ecclesiastical immunities of France from papal control. The articles, which rejected the primacy of the pope, were declared null and void by Pope Alexander VIII in 1690.

1689: The Toleration Act granted a measure of freedom of worship to other English dissenters but not to Catholics.

1704: Chinese Rites — involving the Christian adaptation of elements of Confucianism, veneration of ancestors and Chinese terminology in religion — were condemned by Clement XI.

1720: The Passionists were founded by St. Paul of the Cross.

1724: Persecution in China.

1732: The Redemptorists were founded by St. Alphonsus Liguori.

1738: Freemasonry was condemned by Clement XII and Catholics were forbidden to join, under penalty of excommunication; the prohibition was repeated by Benedict XIV in 1751 and by later popes.

1760s: Josephinism, a theory and system of state control of the Church, was initiated in Austria; it remained in force until about 1850.

1764: Febronianism, an unorthodox theory and practice regarding the constitution of the Church and relations between Church and state, was condemned for the first of several times. Proposed by an auxiliary bishop of Trier using the pseudonym Justinus Febronius, it had the effects of minimizing the office of the pope and supporting national churches under state control.

1773: Clement XIV issued a brief of suppression against the Jesuits, following their expulsion from Portugal in 1759, from France in 1764 and from Spain in 1767. Political intrigue and unsubstantiated accusations were principal factors in these developments. The ban, which crippled the society, contained no condemnation of the Jesuit constitutions, particular Jesuits or Jesuit teaching. The society was restored in 1814.

1778: Catholics in England were relieved of some civil disabilities dating back to the time of Henry VIII, by an act which permitted them to acquire, own and inherit property. Additional liberties were restored by the Roman Catholic Relief Act of 1791 and subsequent enactments of Parliament.

1789: Religious freedom in the United States was guaranteed under the First Amendment to the Constitution.

Beginning of the French Revolution which resulted in: the secularization of church property and the Civil Constitution of the Clergy in 1790; the persecution of priests, religious and lay persons loyal to papal authority; invasion of the Papal States by Napoleon in 1796; renewal of persecution from 1797-1799; attempts to dechristianize France and establish a new religion; the occupation of Rome by French troops and the forced removal of Pius VI to France in 1798.

This century is called the age of Enlightenment or Reason because of the predominating rational and scientific approach of its leading philosophers, scientists and writers with respect to religion, ethics and natural law. This approach downgraded the fact and significance of revealed religion. Also characteristic of the Enlightenment were subjectivism, secularism and optimism regarding human perfectibility.

1801: Concordat between Napoleon and Pope Pius VII is signed.  It is soon violated by the Organic Articles issued by Napoleon in 1802.

1804: Napoleon crowns himself Emperor of the French with Pope Pius in attendance.

1809: Pope Pius VII was made a captive by Napoleon and deported to France where he remained in exile until 1814. During this time he refused to cooperate with Napoleon who sought to bring the Church in France under his own control, and other leading cardinals were imprisoned.

The turbulence in church-state relations in France at the beginning of the century recurred in connection with the Bourbon Restoration, the July Revolution, the second and third Republics, the Second Empire and the Dreyfus case.

1814: The Society of Jesus, suppressed since 1773, was restored.

1817: Reestablishment of the Congregation for the Propagation of the Faith (Propaganda) by Pius VII was an important factor in increasing missionary activity during the century.

1820: Year’s-long persecution, during which thousands died for the faith, ended in China. Thereafter, communication with the West remained cut off until about 1834. Vigorous missionary work got under way in 1842.

1822: The Pontifical Society for the Propagation of the Faith, inaugurated in France by Pauline Jaricot for the support of missionary activity, was established.

1829: The Catholic Emancipation Act relieved Catholics in England and Ireland of most of the civil disabilities to which they had been subject from the time of Henry VIII.

1832: Gregory XVI, in the encyclical Mirari vos, condemned indifferentism, one of the many ideologies at odds with Christian doctrine which were proposed during the century.

1833: Start of the Oxford Movement which affected the Church of England and resulted in some notable conversions, including that of John Henry Newman in 1845, to the Catholic Church.

Bl. Frederic Ozanam founded the Society of St. Vincent de Paul in France. The society’s objectives are works of charity.

1848: The Communist Manifesto, a revolutionary document symptomatic of socio-economic crisis, was issued.

1850: The hierarchy was reestablished in England and Nicholas Wiseman made the first archbishop of Westminster. He was succeeded in 1865 by Henry Manning, an Oxford convert and proponent of the rights of labor.

1853: The Catholic hierarchy was reestablished in Holland.

1854: Pius IX proclaimed the dogma of the Immaculate Conception in the bull Ineffabilis Deus.

1858: The Blessed Virgin Mary appeared to St. Bernadette at Lourdes, France.

1864: Pius IX issued the encyclical Quanta cura and the Syllabus of Errors in condemnation of some 80 propositions derived from the scientific mentality and rationalism of the century. The subjects in question had deep ramifications in many areas of thought and human endeavor; in religion, they explicitly and/or implicitly rejected divine revelation and the supernatural order.

1867: The first volume of Das Kapital was published. Together with the Communist First International, formed in the same year, it had great influence on the subsequent development of communism and socialism.

1869: The Anglican Church was disestablished in Ireland.

1869-70: Ecumenical Council of the Vatican (I). It defined papal primacy and infallibility in a dogmatic constitution on the Church; covered natural religion, revelation, faith, and the relations between faith and reason in a dogmatic constitution on the Catholic faith.

1870-71: Victor Emmanuel II of Sardinia, crowned king of Italy after defeating Austrian and papal forces, marched into Rome in 1870 and expropriated the Papal States after a plebiscite in which Catholics, at the order of Pius IX, did not vote. In 1871, Pius IX refused to accept a Law of Guarantees. Confiscation of church property and hindrance of ecclesiastical administration by the regime followed.

1871: The German Empire, a confederation of 26 states, was formed. Government policy launched a Kulturkampf whose May Laws of 1873 were designed to annul papal jurisdiction in Prussia and other states and to place the Church under imperial control. Resistance to the enactments and the persecution they legalized forced the government to modify its anti-Church policy by 1887.

1878: Beginning of the pontificate of Leo XIII, who was pope until his death in 1903. Leo is best known for the encyclical Rerum novarum, which greatly influenced the course of Christian social thought and the labor movement. His other accomplishments included promotion of Scholastic philosophy and the impetus he gave to scriptural studies.

1881: The first International Eucharistic Congress was held in Lille, France.

Alexander II of Russia was assassinated. His policies of Russification — as well as those of his two predecessors and a successor during the century — caused great suffering to Catholics, Jews and Protestants in Poland, Lithuania, the Ukraine and Bessarabia.

1882: Charles Darwin died. His theory of evolution by natural selection, one of several scientific highlights of the century, had extensive repercussions in the faith-and-science controversy.

1887: The Catholic University of America was founded in Washington, D.C.

1893: The U.S. apostolic delegation was set up in Washington, D.C.

1901: Restrictive measures in France forced the Jesuits, Benedictines, Carmelites and other religious orders to leave the country. Subsequently, 14,000 schools were suppressed; religious orders and congregations were expelled; the concordat was renounced in 1905; church property was confiscated in 1906. For some years the Holy See, refusing to comply with government demands for the control of bishops’ appointments, left some ecclesiastical offices vacant.

1903-14: Pontificate of St. Pius X. He initiated the codification of canon law, 1904; removed the ban against participation by Catholics in Italian national elections, 1905; issued decrees calling upon the faithful to receive Holy Communion frequently and daily, and stating that children should begin receiving the Eucharist at the age of seven, 1905 and 1910, respectively; ordered the establishment of the Confraternity of Christian Doctrine in all parishes throughout the world, 1905; condemned Modernism in the decree Lamentabili and the encyclical Pascendi, 1907.

1908: The United States and England, long under the jurisdiction of the Congregation for the Propagation of the Faith as mission territories, were removed from its control and placed under the common law of the Church.

1910: Laws of separation were enacted in Portugal, marking a point of departure in church-state relations.

1911: The Catholic Foreign Mission Society of America — Maryknoll, the first U.S.-founded society of its type — was established.

1914: Start of World War I, which lasted until 1918.

1914-22: Pontificate of Benedict XV. Much of his pontificate was devoted to seeking ways and means of minimizing the material and spiritual havoc of World War I. In 1917 he offered his services as a mediator to the belligerent nations, but his pleas for settlement of the conflict went unheeded.

1917: The Blessed Virgin Mary appeared to three children at Fatima, Portugal.

A new constitution, embodying repressive laws against the Church, was enacted in Mexico. Its implementation resulted in persecution in the 1920s and 1930s.

Bolsheviks seized power in Russia and set up a communist dictatorship. The event marked the rise of communism in Russian and world affairs. One of its immediate, and lasting, results was persecution of the Church, Jews and other segments of the population.

1918: The Code of Canon Law, in preparation for more than 10 years, went into effect in the Western Church.

1919: Benedict XV stimulated missionary work through the decree Maximum Illud, in which he urged the recruiting and training of native clergy in places where the Church was not firmly established.

1920-22: Ireland was partitioned by two enactments of the British government which (1) made the six counties of Northern Ireland part of the United Kingdom in 1920 and (2) gave dominion status to the Irish Free State in 1922. The Irish Free State became an independent republic in 1949.

1922-39: Pontificate of Pius XI. He subscribed to the Lateran Treaty, 1929, which settled the Roman Question created by the confiscation of the Papal States in 1871; issued the encyclical Casti connubii, 1930, an authoritative statement on Christian marriage; resisted the efforts of Benito Mussolini to control Catholic Action and the Church, in the encyclical Non abbiamo bisogno, 1931; opposed various fascist policies; issued the encyclicals Quadragesimo anno, 1931, developing the social doctrine of Leo XIII’s Rerum novarum, and Divini Redemptoris, 1937, calling for social justice and condemning atheistic communism; condemned anti-Semitism, 1937.

1926: The Catholic Relief Act repealed virtually all legal disabilities of Catholics in England.

1931: Leftists proclaimed Spain a republic and proceeded to disestablish the Church, confiscate church property, deny salaries to the clergy, expel the Jesuits and ban teaching of the Catholic faith. These actions were preludes to the civil war of 1936-1939.

1933: Emergence of Adolf Hitler to power in Germany. By 1935 two of his aims were clear, the elimination of the Jews and control of a single national church. Six million Jews were killed in the Holocaust. The Church was subject to repressive measures, which Pius XI protested futilely in the encyclical Mit brennender sorge in 1937.

1936-39: Civil war in Spain between the leftist Loyalist and the forces of rightist leader Francisco Franco The Loyalists were defeated and one-man, one-party rule was established. Many priests, religious and lay persons fell victim to Loyalist persecution and atrocities.

1939-45: World War II.

1939-58: Pontificate of Pius XII. He condemned communism, proclaimed the dogma of the Assumption of Mary in 1950, in various documents and other enactments provided ideological background for many of the accomplishments of the Second Vatican Council. (See Twentieth Century Popes.)

1940: Start of a decade of communist conquest in more than 13 countries, resulting in conditions of persecution for a minimum of 60 million Catholics as well as members of other faiths.

Persecution diminished in Mexico because of non-enforcement of anti-religious laws still on record.

1950: Pius XII proclaimed the dogma of the Assumption of the Blessed Virgin Mary.

1957: The communist regime of China established the Patriotic Association of Chinese Catholics in opposition to the Church in union with the pope.

1958-63: Pontificate of John XXIII. His principal accomplishment was the convocation of the Second Vatican Council, the twenty-first ecumenical council in the history of the Church. (See Twentieth Century Popes.)

1962-65: Ecumenical Council of the Vatican (II). It formulated and promulgated 16 documents — two dogmatic and two pastoral constitutions, nine decrees and three declarations — reflecting pastoral orientation toward renewal and reform in the Church, and making explicit dimensions of doctrine and Christian life requiring emphasis for the full development of the Church and the better accomplishment of its mission in the contemporary world.

1963-78: Pontificate of Paul VI. His main purpose and effort was to give direction and provide guidance for the authentic trends of church renewal set in motion by the Second Vatican Council. (See Twentieth Century Popes.)

1978: The thirty-four-day pontificate of John Paul I.

Start of the pontificate of John Paul II; see Index.

1983: The revised Code of Canon Law, embodying reforms enacted by the Second Vatican Council, went into effect in the Church of Roman Rite.

1985: Formal ratification of a Vatican-Italy concordat replacing the Lateran Treaty of 1929.

1989-91: Decline and fall of communist influence and control in Middle and Eastern Europe and the Soviet Union.

1991: The Code of Canon Law for Eastern Churches went into effect.

The Gulf War was waged to eject Saddam Hussein from Kuwait.

1992: Approval of the new Catechism of the Catholic Church.

The Vatican closed officially the case against Galileo Galilei.

1994: Initiation of celebration preparations of the start of the third Christian millennium in the year 2000.

1997: Pope John Paul II issued an apology for any anti-Semitism by Catholics; a conference on anti-Semitism was also held in Rome and a number of Catholic leaders in Europe issued apologies for historical anti-Semitism.

1998: Pope John Paul II visited Cuba and secured the release of over 300 political prisoners. The Vatican issued a white paper on Anti-Semitism, titled: We Remember: A Reflection on the Shoah. Twentieth anniversary of the pontificate of Pope John Paul II; he became the longest reigning pontiff elected in the 20th century.  

2000: The Catholic Church celebrated the Holy Year 2000 and the Jubilee; commencement of the third Christian millennium. Pope John Paul II issued apology for the sinful actions of the Church’s members in the past. Pope John Paul II traveled to the Holy Land.

2001: Pope John Paul II traveled to Greece and Syria. He also named 44 new members to the College of Cardinals in an unprecedented consistory.On September 11, the World Trade Center was destroyed and the Pentagon attacked by Islamic terrorists who hijacked several planes and used them as weapons of mass destruction. The attacks launched a global war on terror.

2003: Pope John Paul II appealed for a peaceful resolution to the Iraq War. A coalition headed by the U.S. removed Saddam Hussein.