May 21 In the year 1254 koenraad IV, RC-German king (1237-54), dies at 26
Nov 03 Johannes III Doukas Vatatzes, Byzantine Emperor (1222-54)/saint, dies in the year 1254.
Dec 07 Innocent IV, [Sinibaldo dei Fieschi], Pope (1243-54), dies on this day in history.
May 13 On this day in history birth of maria of Brabant, queen of France (d. 1321)
Sep 15 Marco Polo, Italian explorer (d. 1324) was born on this day in history.
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Important Dates And Events In History - Hisdates.Com