c. AD 33 Pentecost Milestone c. AD 50 Council of Jerusalem Council 313 Edict of Milan Milestone 325 First Council of Nicaea Council 381 First Council of Constantinople Council 431 Council of Ephesus Division 431 onward Church of the East Milestone 451 Council of Chalcedon Division 451 onward Oriental Orthodox Communion Milestone 506 Council of Dvin Council 590 Gregory the Great elected Milestone 635 East Syriac mission to China Milestone 787 Second Council of Nicaea Council 16 July 1054 The Great Schism Division 1054 onward Eastern Orthodox Church Milestone 1054 onward Roman Catholic Church Milestone 1204 Sack of Constantinople Milestone 1378–1417 The Western Schism Division 1439 Council of Florence Reunion 29 May 1453 Fall of Constantinople Milestone 31 Oct 1517 The Ninety-five Theses Division 21 Jan 1525 First adult baptisms in Zürich Division 1527 Schleitheim Confession Milestone 25 June 1530 Augsburg Confession Milestone 1534 Act of Supremacy — the Anglican split Division 1536 Calvin's Institutes and the Reformed church Milestone 1545–1563 Council of Trent Council 1549 Book of Common Prayer Milestone 1559 Elizabethan Settlement Milestone 1589 Patriarchate of Moscow Milestone 1609 First Baptist congregation Milestone 1646 Westminster Confession Milestone 1675 Pietism — Pia Desideria Milestone 1693 Amish division Division 24 May 1738 Aldersgate — the Methodist revival Division 1784 Christmas Conference, Baltimore Milestone 1867 First Lambeth Conference Milestone 1867 The Holiness movement Milestone 1870 First Vatican Council Council 1906 Azusa Street Revival Division 1914 Assemblies of God founded Milestone 1948 World Council of Churches Reunion 1960s Charismatic renewal Milestone 1962–1965 Second Vatican Council Council 7 Dec 1965 Catholic–Orthodox declaration Reunion 1990 Chambésy agreement Reunion 11 Nov 1994 Common Christological Declaration Reunion 31 Oct 1999 Joint Declaration on Justification Reunion 2016 Holy and Great Council of Crete Council 