Who built the 'Thousand Pillars Palace' during the

Solution

During the Sultanate period, Alauddin Khilji built the 'Thousand Pillared Palace', Khilji built Siri Mahal, Alai Darwaza, Jamaat Khana etc. at the Dargah of Nizamuddin Auliya. The buildings of Alauddin Khilji were made completely according to Islamic ideology. Scientific method was used for the first time in the construction of Alai Darwaza, it was the first building where only Islamic methods were used, in addition it also has a dome.