Alfonso III of Asturias

Alfonso III
Miniature (c.1118) from the archives of Oviedo Cathedral showing Alfonso III flanked by his queen, Jimena (left), and his bishop, Gomelo II (right).
King of Asturias
Reign866910
PredecessorOrdoño I
SuccessorFruela II (Asturias)
Ordoño II (Galicia)
García I (León)
Bornc.848
Died20 December 910
Burial
ConsortJimena of Asturias
IssueGarcía I of León
Ordoño II of León
Fruela II of León
DynastyAstur-Leonese dynasty
FatherOrdoño I of Asturias
MotherNuña
ReligionChalcedonian Christianity
Signature

Alfonso III (c.848  20 December 910), called the Great (Spanish: el Magno), was king of Asturias from 866 until his death. He was the son and successor of Ordoño I. After his death, the Kingdom of Asturias was split between his sons, with García inheriting León, Ordoño inheriting Galicia, and Fruela inheriting Asturias.

In later sources, he is the earliest to be called "Emperor of Spain." He was also titled "Prince of all Galicia" (Princeps totius Galletiae).