"The Western Schism had its roots within the papal Curia. Even before there were two international obediences, or two popes, even before two legal opinions began to be argued about the validity of the April election, and before the ultramontane cardinals and Urban VI had gone to their separate summer refuges of Anagni and Tivoli, the nucleus of the Curia was split in interest and policy between two ministers, the heads of the Chancery and of the Camera, Bartolomeo Prignano and Pierre de Cros."
