May 21 Conrad IV, King of Germany, Jerusalem and Sicily, dies at 26 Nov 3 Johannes III Doukas Vatatzes, Byzantine Emperor (1222-54)/saint, dies Innocent IV (c. 1195 - 1254) Dec 7 Italian pope (1243-54), dies at 58 or 59 1253 Famous Deaths by Year 1256 Famous People by Cause of Death Assassination Drug Overdose Gunshot Wound Murder Plane Crash Suicide