1. Great Schism - Noun
2. Great Schism - Proper noun
the period from 1378 to 1417 during which there were two papacies in the Roman Catholic Church, one in Rome and one in Avignon
Source: WordNetAfter the Great Schism of 1054, in 1215 the Fourth Lateran Council declared, in its fifth canon, that the Roman Church "by the will of God holds over all others pre-eminence of ordinary power as the mother and mistress of all the faithful". Source: Internet
This contributed to cultural and theological differences between Eastern and Western Christianity eventually leading to the Great Schism that divided Western Catholicism from Eastern Orthodoxy from 1054 onwards. Source: Internet
Loyn "Great Schism" Middle Ages p. 153 Ecclesiastical officials convened at the Council of Constance in 1414, and in the following year the council deposed one of the rival popes, leaving only two claimants. Source: Internet
The bishops and secular leaders, tired of the Great Schism, supported Sigismund when he called the Council of Constance in 1414. Source: Internet
Following the Great Schism, Roman Catholicism sees and recognizes the Orthodox Sacraments as valid. Source: Internet
In 1054, the Great Schism rent the church in two, however. Source: Internet