HMMMmmm...
Pope Stephen VI (896–897), who had his predecessor Pope Formosus exhumed, tried, de-fingered, briefly reburied, and thrown in the Tiber.[1]
Pope John XII (955–964), who gave land to a mistress, murdered several people, and was killed by a man who caught him in bed with his wife.
Pope Benedict IX (1032–1044, 1045, 1047–1048), who "sold" the Papacy
Pope Boniface VIII (1294–1303), who is lampooned in Dante's Divine Comedy
Pope Urban VI (1378–1389), who complained that he did not hear enough screaming when Cardinals who had conspired against him were tortured.[2]
Pope Alexander VI (1492–1503), a Borgia, who was guilty of nepotism and whose unattended corpse swelled until it could barely fit in a coffin.[3]
Pope Leo X (1513–1521), a spendthrift member of the Medici family who once spent 1/7 of his predecessors' reserves on a single ceremony[4]
Pope Clement VII (1523–1534), also a Medici, whose power-politicking with France, Spain, and Germany got Rome sacked.
These guys started showing up in Italy just before the end of the Reconquista. They'd been providing heavy armed knights to Spanish princes for well over 500 years. Those guys would frequently succeed at overrunning islamic held land, which would result in a substantial profit and other benefits to the knight(s) responsible. They'd remit many of the profits to the folks back home and you can imagine how valuable that practice was to Brittany.
During the 1500s several conflicting pressures came to a head in Brittany. The rural nobles became both Protestants and fans of the idea of being incorporated into the Hapsburg domains (even though Filippe was supposed to be virulently anti-protestant).
At the same time the urban nobles stayed Catholic but were fans of Henry IV becoming King of France (paris is worth a mass).
The end result of those conflicts was the emigration (over time) of about 90% of all Bretons to some other place! Many went to Sweden where they were identified by the local goobers as "French noblemen"
Their brethren in Spain also emigrated to the Americas in large numbers ~ almost all those longer Spanish surnames are actually sentences in Cornish that tell us what job their ancestors had in medieval armies in the Reconquista.
Again, with the source of the nation's wealth cut off, many Bretons in Spain migrated to Italy. There are vast storehouses of ancient records attending to their rapacity as they began looting Italy. The Borgias were the least of it!