The Qutb complex (Hindi: क़ुतुब, Urdu: قطب‎), also spelled Qutab or Qutub, is an array of monuments and buildings at Mehrauli in Delhi, India. The best-known structure in the complex is the Qutb Minar, built to honor the Sufi saint Qutbuddin Bakhtiar Kaki. Its foundation was laid by 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 (a.k.a. Altamash) and much later by Firoz Shah Tughlaq, a Tughlaq dynasty Sultan of Delhi in 1368 AD. the construction of the Qubbat-ul-Islam Mosque or Dome of Islam [later corrupted into Quwwat-ul 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 CE 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.