de Rais
Gilles de Laval, Baron de Rais
(1404 - 1440) An ally of Joan of Arc during the Hundred Year War, de Rais was instrumental in driving the English out of France. After the war he was named Marshal of France by King Charles VII and settled in a Brittany estate. There he enjoyed killing young boys, whom he would sodomize before and after decapitation. He also liked to watch his servants murder boys, as he masturbated over their entrails. De Rais was interested in black magic and alchemy. Murders that weren't for his own pleasure were used as sacrifices in an effort to turn iron into gold.

De Rais was arrested for heresy after attacking a priest. He was soon charged with murder, and eventually confessed to killing at least 800 children. His servants were tortured into confessing and de Rais was found guilty. He begged for forgiveness from the parents of the children he had killed, and was allowed to be garroted to death before he was burned.

See also "Gilles de Rais" by Aleister Crowley.