Nāṣir ad-Dīn Maḥmūd (Persian: ناصر الدين محمود) was the eldest son of the Delhi Sultan Shamsuddin Iltutmish and his chief consort Turkan Khatun,[1] (as the court historian Minhaj-i Siraj Juzjani clearly mentioned in the Tabaqat-i Nasiri, the only contemporary source of history of that time), the daughter of Qutb ud-Din Aibak.
Thus in 1231 Iltutmish marched against him and defeated him and made Alauddin Jani as the next governor of Bengal.
[4] He subsequently attacked Tibet however he had to retreat back to Bengal due to cold weather and snow as many of his soldiers had died of hypothermia.
[4] His tomb is now called Sultan Ghari, which is the oldest Islamic mausoleum of India.
This complex also houses the tombs of Ruknuddin Firuz and Muiz ud din Bahram.