Alauddin Kalji introduced an innovative Chehra and Dagh System wherein the Chehra system involved the detailed description of each soldier and Dagh system involved branding of horses. Strict review of the army from time totime was carried out.
The Mosque was built by Mughal emperor, Shah Jahan’s daughter in 1648 A.D. It was constructed by more than 5000 workers. It was originally called Masjid-i-Jahan Numa, meaning ‘mosque commanding view of the world’.
Khwaja Abu Malik Isami is the author of Futuh-al-Salatin is yet another elaborate account of the Delhi Sultanate. It consists of almost 12,000 verses. The Futuh-us-Salatin is a history of Muslim rule in India until 1349-50.