Image of an ancient door at Qutb Complex. This is a UNESCO World Heritage site. The Qutb complex also spelled Qutab or Qutub, is an array of monuments and buildings at Mehrauli in Delhi, India. After the death of the commissioner, the Minar was added upon by his successor Iltutmish and much later by Firoz Shah Tughlaq, of the Tughlaq dynasty, Sultan of Delhi in 1368 AD. The complex initially housed a complex of twenty-seven ancient Jain temples which were destroyed and their material used in the construction of the Quwwat-ul-Islam Mosque next to the Qutb Minar, in the Qutb complex, built on the ruins of Lal Kot Fort built by Tomar Rajput ruler, Anangpal in 739 AD and Qila-Rai-Pithora, Prithviraj Chauhan's city, the Rajput king, whom Ghori's Afghan armies had earlier defeated and killed, at the Second Battle of Tarain. The complex was added to by many subsequent rulers, including Firoz Shah Tughlaq and Ala ud din Khilji as well as the British.