Alfonso X of Castile

Alfonso X (November 23, 1221 – April 4, 1284) was a Spanish monarch who ruled as the King of Galicia, Castile and León from 1252 until his death. He was elected Rex Romanorum in 1254. His nicknames were "el Sabio" ("the Wise", more accurately translated "the Learned") and "el Astrólogo" ("the Astrologer").