Quwwat al Islam Mosque, Mausoleum of Iltutmish, by Unknown Artist, 1235, 13th Century. India, National Capital Territory of Dehli -NCT, Delhi, Delhi, Mosque Quwwat al-Islam. Outside view of the Mausoleum of Iltuthish, 1235, masonry arch. The tomb consists of a square dome covered building with an underground crypt and was most probably evidently built by indigenous workers workmen. Entrance portal arch ogival pointed arch geometric decoration inscriptions. 2009 photograph.