POPE JOHN PAUL II!
You knew him as: The Catholic Church's third longest reigning pontiff. Born Karol Józef Wojtyla in 1920, he was the first Slavic pope ever, & the first non-Italian pope in over 450 years. Actually apologized for the Crusades & the Spanish Inquisition. Nobody expected that, either.
Cause of death: Parkinson's.
Age: 84.