The Qutb complex is an array of monuments and buildings viz. Qutb Minar, Iron Pillar, Qubbat-ul-islam Mosque, Alai Minar, Tomb of Iltutmish, tomb of Allauddin Khilji among others at Mehrauli in Delhi, India. The best-known structure in the complex is the Qutb Minar, built to celebrate the victory of Mohammed Ghori over Rajput  king Prithviraj Chauhan in 1192 AD, by his then viceroy, Qutb-ud-din Aibak, who later became the first Sultan of Delhi of the Mamluk dynasty.After the death of the viceroy, the Minar was added upon by his successor Iltutmish and much later by Firoz Shah Tuglhaq.The complex initially housed twenty-seven ancient Hindu and Jain temples which were destroyed and their material used in the construction of the Qubbat-ul-Islam Mosque or Dome of Islam 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.In UNESCO’s list of world heritage, the Qutb Complex is inscribed as Qutb Minar and its Monuments. The Qutb Minar is 72.5 metres (239 ft) high, has five distinct storeys, each marked by a projecting balcony carried on muqarnas corbel and tapers from a diameter 14.32 metres at the base to 2.75 metres at the top, which is 379 steps away.