The Battle of Manzikert or Malazgirt was fought between the Byzantine Empire and the Seljuk Empire on 26 August 1071 near Manzikert (modern Malazgirt in Muş Province, eastern Turkey). It was the only time a Byzantine emperor became the prisoner of a Muslim commander, and the first time since Valerian that a Roman emperor (Diogenes) was captured alive by an enemy force.