Well if you don’t know, just say so.
Top 10 Most Wicked Popes
Jamie Frater August 17, 2007
http://listverse.com/2007/08/17/top-10-most-wicked-popes/
...and more
http://christian-truths2.blogspot.com/2010/11/many-popes-have-been-labelled-most-evil.html
...and even more
http://www.historyguy.com/wars_papal.html#.Uol5K-IVWeY
http://en.wikipedia.org/wiki/List_of_popes
Questions Answered
http://www.gotquestions.org/Catholic-questions.html
I do know — but do your own homework.