Popes are controversial figures and some have been involved in questionable behavior including: orgies, selling the papacy, killing cardinals, and torture. 

Here are the 10 worst popes of all time, you can read more about them here.

  1. Pope Stephen VI: had his predecessor exhumed, tried, de-fingered, and thrown to the river
  2. Pope Benedict IX: the Pope who sold the papacy
  3. Pope Sergius III: ordered the murder of another pope and started the "pornocracy"
  4. Pope John XII: raped female pilgrims and invoked pagan gods
  5. Pope Leo X: sold indulgences, killed cardinals
  6. Pope Alexander VI: nepotism, orgies and the rise of the Borgia family
  7. Pope Innocent IV: introduced torture on the Inquisition
  8. Pope Urban VI: complained he did not hear enough screaming when his Cardinals were tortured
  9. Pope John XV: split the church's finances among his relatives
  10. Pope Clement VII: his power-politicking with France, Spain and Germany got Rome sacked