I will not live in the same rooms as the Borgias lived. He [Pope Alexander VI] desecrated the Holy Church as none before. He usurped the papal power by the devil's aid, and I forbid under the pain of excommunication anyone to speak or think of Borgia again. His name and memory must be forgotten. It must be crossed out of every document ad memorial. His reign must be obliterated. All paintings made of the Borgias or for them must be covered over with black crepe. All the tombs of the Borgias must be opened and their bodies sent back to where they belong — to Spain.

As quoted in Sex Lives of the Popes (1996) by Nigel Cawthorne, p. 219