Malik-Shah I
In the 1070s, after the battle of Manzikert, the Seljuk commander Suleiman ibn Qutulmish, a distant cousin of Malik-Shah I and a former contender for the throne of the Seljuk Empire, came to power in western Anatolia. In 1075, he captured the Byzantine cities of Nicaea (İznik) and Nicomedia (İzmit). Two years later, he declared himself sultan of an independent Seljuk state and established his capital at İznik.