Alfonso IV, called the Monk, was King of León from 925 and King of Galicia from 929, until he abdicated in 931.
King Alfonso in a 15th-century manuscript of the Semblanzas de reyes
The Kingdom of León was an independent kingdom situated in the northwest region of the Iberian Peninsula. It was founded in 910 when the Christian princes of Asturias along the northern coast of the peninsula shifted their capital from Oviedo to the city of León. The kings of León fought civil wars, wars against neighbouring kingdoms, and campaigns to repel invasions by both the Moors and the Vikings, all in order to protect their kingdom's changing fortunes.
Alfonso the Great (848-910), king of León, Galicia and Asturias
The new kingdom of León, 910
Mozarabic church of Santiago de Peñalba
Codex biblicus legionensis