Taj al-Mulk Abu'l Ghana'em Marzban ibn Khosrow Firuz Shirazi[1] (Persian: تاج‌الملک ابوالغنائم مرزبان بن خسرو فیروز‎), better simply known as Taj al-Mulk (تاج الملک) was a Seljuq courtier during the reigns of Malik-Shah I and his son Barkiyaruq.