The title says it all.

We've had famous Leaders and etc, but we never stopped and thought about the infamous leaders, the ones that we curse in our sleeps, the ones that have made lasting impression on history.

Isabel and Ferdinand of Spain
-Medieval Rulers of Spain
-Spanish Reconquest
-Forced Converted millions of citizen to Catholicism
-Booted the Moors out of Spain
-Used military might and religious fear to control the masses