Alfonso III (c. 848 – 20 December 910), called the Great (Spanish: el Magno), was the king of León, Galicia and Asturias from 866 until his death. He was the son and successor of Ordoño I. In later sources, he is the earliest to be called "Emperor of Spain." He was also titled "Prince of all Galicia" (Princeps totius Galletiae). Source: Wikipedia (en)