- Sultan Ghari was the first monumental tomb built in India, constructed by Iltutmish (3) in 1231 AD for his eldest son, Prince Nasiruddin Mahmud. - Red Place (Lal Mahal) was built by Sultan Balban (4) in Delhi. - Jamat Khana Masjid, located within the Nizamuddin Dargah complex, is one of the earliest mosques in Delhi built entirely according to Islamic rites. While completed later, its core structure and central dome were initiated by Khizr Khan, son of Alauddin Khilji (1), during his reign. - Dhai Din ka Jhopra is a mosque in Ajmer, built by Qutbuddin Aibak (2) by converting a Sanskrit college and incorporating elements from demolished Hindu and Jain temples.