This practice aroused grave opposition and gave rise to many abuses, especially during the Western Schism.

This would pave the way for the end of the Western Schism.

They declared the papal see as vacant; which led to the Western Schism.

He held office during the years of the Western Schism.

During the Western Schism, many cardinals were created by the contending popes.

This was the beginning of the Western Schism, which was to last until 1415.

He was the second Roman Pope of the Western Schism.

Petit's career occurred at the time of the Western Schism.

The Western Schism divided Christianity first between two, then three, popes.

European polyphony rose prior to, and during the period of the Western Schism.