December 17, 63 AD Lazarus died again (according to tradition). 546 Gothic War: The Ostrogoths of King Totila conquer Rome by bribing the Byzantine garrison. 920 Romanos I was crowned co-emperor of the underage Emperor Constantine VII. 942 Assassination of William I of Normandy. 1187 Pope Gregory VIII died. In his brief pontificate, Gregory initiated the Third Crusade and began reforms in the Curia.
1531 Pope Clement VII established a parallel body to the Inquisition in Lisbon, Portugal. 1538 Pope Paul III excommunicated Henry VIII of England.