Monasticism By Jalen Wong 451 Monasticism Jan 1, 1054 East and West Split Nov 27, 1095 1st Crusades Jan 1, 1147 2nd Crusades Jan 1, 1189 3rd Crusades Jan 1, 1202 4th Crusades Jan 1, 1228 6th Crusades Jan 1, 1248 7th Crusades Jan 1, 1270 8th Crusaders Jan 1, 1320 Black Death Jan 1, 1517 Protestant Reformation Jan 1, 1545 Council of Trent Jan 1, 1869 First Vatican Council Jan 1, 1961 Ecumenism Oct 11, 1962 2nd Vatican Council