The Battle of Graus was a battle of the Reconquista, traditionally said to have taken place on 8 May 1063. Antonio Ubieto Arteta, in his Historia de Aragón, re-dated the battle to 1069. The late twelfth-century Chronica naierensis dates the encounter to 1070. Either in or as a result of the battle, Ramiro I of Aragon, one of the protagonists, died.