May 01 Stefanus IV Uros I de Great, King of Serbia (1243-76), dies in the year 1277.
May 20 John XXI, [Petrus Juliani/Hispanus], Port Pope (1276-77), dies on this day in history.
Jul 01 In the year 1277 death of baibars, Mameluk sultan of Egypt (b. 1223)
Important Dates And Events In History - Hisdates.Com