Alfonso X of Castile

Alfonso X (also occasionally Alphonso X, Alphonse X, or Alfons X, 23 November 1221 – 4 April 1284), called the Wise , was the King of Castile, León and Galicia from 30 May 1252 until his death. During the Imperial election of 1257, a dissident faction chose him to be King of the Romans (; ) on 1 April. He renounced his imperial claim in 1275, and in creating an alliance with England in 1254 his claim on Gascony also.