Taj al-Mulk

Taj al-Mulk Abu'l Ghana'em Marzban ibn Khosrow Firuz Shirazi[2] (Persian: تاج‌الملک ابوالغنائم مرزبان بن خسرو فیروز), better simply known as Taj al-Mulk (تاج الملک) was a Seljuk courtier during the reigns of Malik-Shah I and his son Berkyaruq.

Not much is known about his life before his post in Seljuq government, but his biographers praised him for his competence, knowledge and fluency, which shows he had enough education.

Some primary sources such as Abd al-Jalil Qazvini Razi claimed that he was an Isma'ili and mentioned a story about his pact with Hassan-i Sabbah, which explain his enmity toward Nizam al-Mulk.

Beside that, Nizam al-Mulk warned Sultan about "those who hide their true goals and intend to depose the vizier and the Abbasid Caliph" in his work, Siyasatnama.

In the following civil war between Berkyaruq (the official heir) and Malik-Ismail (supported by Tarkan Khatun), the latter was defeated in a battle near Boroujerd.