Ismail II was the third shah of Safavid Iran from 1576 to 1577. He was the second son of Tahmasp I with his principal consort, Sultanum Begum of the Mawsillu clan of the Aq Qoyunlu confederation. On the orders of Tahmasp, Ismail spent twenty years imprisoned in Qahqaheh Castle; whether for his recurrent conflicts with the realm's influential vassals, or for his growing popularity with the Qizilbash tribes, resulting in Tahmasp becoming wary of his son's influence.