The Battle of Viadangos or Fontedangos (Fonte de Angos) was fought in the autumn of 1111 between the forces of Alfonso I of Aragon and the Galician allies of his estranged wife, Urraca of León and Castile, at Villadangos north of Luna, some twenty kilometres from León. Alfonso was victorious in a rout, but Urraca's son and co-ruler, Alfonso Raimúndez, escaped.