Alfonso VI, nicknamed the Brave or the Valiant, was king of León (1065–1109), Galicia (1071–1109), and Castile (1072–1109).

Pelagius of Oviedo was a medieval ecclesiastic, historian, and forger who served the Diocese of Oviedo as an auxiliary bishop from 1098 and as bishop from 1102 until his deposition in 1130 and again from 1142 to 1143. He was an active and independent-minded prelate, who zealously defended the privileges and prestige of his diocese. During his episcopal tenure he oversaw the most productive scriptorium in Spain, which produced the vast Corpus Pelagianum, to which Pelagius contributed his own Chronicon regum Legionensium. His work as a historian is generally reliable, but for the forged, interpolated, and otherwise skilfully altered documents that emanated from his office he has been called el Fabulador and the "prince of falsifiers". It has been suggested that a monument be built in his honour in Oviedo.