Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alfonso III (c. 848 20 December 910), called the Great, was the king of León, Galicia and Asturias from 866 until his death. He was the son and successor of Ordoño I. Little is known about Alfonso except the bare facts of his reign and of his comparative success in consolidating the kingdom henceforth known as "of Galicia" or "of Oviedo", during the weakness of the Umayyad princes of Cordoba. He fought against and gained numerous victories over the Muslims of al-Andalus, nonetheless his kingdom was always inferior to that of the Cordobans, and he was thus forced to pay them tribute. He defeated a Basque rebellion in 867 and, much later, a Galician one as well. He conquered Oporto and Coimbra in 868 and 878 respectively. In about 869, he formed an alliance with the Kingdom of Pamplona, and solidified this link by marrying Jimena, who is thought to have been daughter of king García Íñiguez, or less likely, a member of the Jiménez dynasty, and also married his sister Leodegundia to a prince of Pamplona.