Iitutmish , the Sultan of Delhi, was contemporary of Mongol leader Chengiz Khan. In 1221 A.D., there was a danger of expected attack of Chengiz khan on Delhi.
Khwaja Nizam-ud-Din Ahmad Bakshi was a Muslim historian of late medieval India. He was the son of Muhammad Muqim-i-Harawi. Nizamuddin Ahmad wrote the book Tabaqat-i-Akbari which is a general history of the Muslim rule in India coming down to the year of its composition.