[wil421]

Sounds like a great Jeopardy topic. “I’ll take Bad Popes for 1000 Trebek.”

Is there a bad Pope list?

[Luc]

There's a classic book!

https://en.wikipedia.org/wiki/The_Bad_Popes

[bloomingkales]

You can start here:

https://en.m.wikipedia.org/wiki/Saeculum_obscurum

The era is seen as one of the lowest points of the history of the papal office.