Sancho I of León

Sancho I
A miniature of Sancho I, from the Tumbo A in the Cathedral of Santiago de Compostela.
King of León
Reign	956–958
Predecessor	Ordoño III
Successor	Ordoño IV
King of León
Reign	960–966
Predecessor	Ordoño IV
Successor	Ramiro III
Born	c. 935
Died	c. 966
Burial	Basilica of San Isidoro
Consort	Teresa Ansúrez
Issue	Ramiro III Urraca
Dynasty	Astur-Leonese dynasty
Father	Ramiro II of León
Mother	Urraca Sánchez of Pamplona
Religion	Roman Catholicism

Sancho I, called the Fat (c. 932 – 19 December 966) was a king of León.

He was the son of Ramiro II of León and queen Urraca Sánchez of Pamplona. He succeeded his half-brother Ordoño III in 956 and reigned until his death, except for a two-year interruption from 958 to 960, when Ordoño the Wicked usurped the throne. He was a grandson of Sancho I of Pamplona and Toda Aznárez.

At first, Sancho disputed the throne with Ordoño III who had succeeded their father in 951. Upon Ordoño's death, he took the vacant throne, but only two years later he was deposed by the nobles led by the Fernán González of Castile, because of his extreme obesity.

During his exile in Andalus, according to Dozy, Sancho managed to shed at least some portion of his girth under the treatment of Hasdai ibn Shaprut. At the same time, he began endeavoring to reclaim his throne. He first went to his grandmother Toda and asked for aid; next he concluded a treaty with the Moors and, with the help of the Leonese and Navarrese noblesse, he took Zamora in 959 and took his throne back soon afterwards.

As he did not respect his treaty with the Muslims, he experienced many punishing raids in response. The final years of his reign were characterised by the growing independence of the Castilian and Galician nobility. He was killed by poison and succeeded by his son Ramiro III.

His wife was queen Teresa Ansúrez.