Final answer:
During the Great Schism, the French supported the Avignon pope, while the rest of Europe supported the pope in Rome. The split lasted from 1378 until the resolution at the Council of Constance in the 15th century.
Step-by-step explanation:
During the Great Schism, the French supported the Avignon pope, while the rest of Christian Europe supported the pope in Rome. This schism was a significant event in the history of the Church, highlighting deep political divisions and challenging the notion of papal authority. By 1378, competing papal courts emerged, one in Rome and another in Avignon, as the French rulers and French cardinals were unwilling to relinquish the power that came with having a pope under their influence. This period of papal duality lasted for nearly forty years and concluded with the Council of Constance convincing two of the competing popes to resign, though this did little to restore the tarnished reputation of the papacy.