Final answer:
The council that ended the Great Schism was the Council of Constance.
Step-by-step explanation:
The council that ended the Great Schism was the Council of Constance.
The Great Western Schism occurred in the 14th and 15th centuries and involved a period of division within the Catholic Church with multiple popes.
The Council of Constance, which took place from 1414-1418, brought an end to the schism by persuading two of the popes to resign, leaving only one legitimate pope.