The Catholic church became the universal and unifying institution. However, n 1054 there was a split between the Eastern and Western Christian Churches which was prompted by arguments over the Crusades. This split was called the Great Schism. The religious fervour of the Popes in Medieval times transferred into medieval society. A centralized Catholic church was realized under Pope Innocent III in 1198. The church and the power of the Popes was eventually weakened by quarrels between church and state. The Hundred Years War and the Wars of the Roses led to the end of the Feudal system and the emergence of the modern nation state. The Medieval religious reformers of the late Middle Ages and the Renaissance culminated in the Protestant Reformation.

Listof Popes in Medieval Times
The following table provides a list of the names of the Popes in Medieval Times:

1061 - 1073: Pope Alexander II
1073 - 1085: Pope Gregory VII
1086 - 1087: Pope Victor III
1088 - 1099: Pope Urban II
1099 - 1118: Pope Paschal II
1118 - 1119: Pope Gelasius II
1119 - 1124: Pope Callistus II
1124 - 1130: Pope Honorius II
1130 - 1143: Pope Innocent II
1143 - 1144: Pope Celestine II
1144 - 1145: Pope Lucius II
1145 - 1153: Pope Eugene III
1153 - 1154: Pope Anastasius IV
1154 - 1159: Pope Adrian IV
1159 - 1181: Pope Alexander III
1181 - 1185: Pope Lucius III
1185 - 1187: Pope Urban III
1187:            Pope Gregory VIII
1187 - 1191: Pope Clement III
1191 - 1198: Pope Celestine III
1198 - 1216: Pope Innocent III
1216 - 1227: Pope Honorius III
1227 - 1241: Pope Gregory IX
1241:            Pope Celestine IV
1243 - 1254: Pope Innocent IV
1254 - 1261: Pope Alexander IV
1261 - 1264: Pope Urban IV
1265 - 1268: Pope Clement IV
1271 - 1276: Pope Gregory X
1276:            Pope Innocent V
1276:            Pope Adrian V
1276 - 1277: Pope John XXI
1277 - 1280: Pope Nicholas III
1281 - 1285: Pope Martin IV
1285 - 1287: Pope Honorius IV
1288 - 1292: Pope Nicholas IV
1294:            Pope Celestine V
1294 - 1303: Pope Boniface VIII
1303 - 1304: Pope Benedict XI
1305 - 1314: Pope Clement V
1316 - 1334: Pope John XXII
1334 - 1342: Pope Benedict XII
1342 - 1352: Pope Clement VI
1352 - 1362: Pope Innocent VI
1362 - 1370: Pope Urban V
1370 - 1378: Pope Gregory XI
1378 - 1389: Pope Urban VI
1389 - 1404: Pope Boniface IX
1404 - 1406: Pope Innocent VII
1406 - 1415: Pope Gregory XII
1417 - 1431: Pope Martin V
1431 - 1447: Pope Eugene IV
1447 - 1455: Pope Nicholas V
1455 - 1458: Pope Callistus III
1458 - 1464: Pope Pius II
1464 - 1471: Pope Paul II
1471 - 1484: Pope Sixtus IV
1484 - 1492: Pope Innocent VIII