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 Mansabdari system the mansab rank was not hereditary and the lowest rank was 10 and the highest was 5,000 for the nobles. All appointments and promotions as well as dismissals in the Mansabdari system were directly made by the emperor.
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.