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.
Tall minarets were the significant and one of the earliest features of Islamic architecture. A double dome is built of two layers. One layer inside which provides ceiling to the interior of the building and the other layer is the outer one which crowns the buildings. The method of making double dome was practised in East Asia for quite some time before it was imported into India. A cenotaph is an empty tomb or a monument erected in honour of a person or group of people whose remains are elsewhere.
Under the rule of the Vijayanagar empire, irrigation became prominent. The development of irrigation took place mainly during the rule of Deva Raya I. New tanks were built and dams were constructed across the river Tungabhadra.
The Tabaqat-i-Nasiri which was compiled in 1260 CE by the author Minhaj-i-Siraj and it gives a complete account of Muhammad of Ghur’s conquest of India and the history of the Delhi Sultanate up to 1260 CE.