Hauz Khas Complex (Hindi: हौज़ ख़ास, Punjabi: ਹੌਜ਼ ਖ਼ਾਸ, Urdu: حوض خاص‎) in Hauz Khas, South Delhi houses a water tank, an Islamic seminary, a mosque, a tomb and pavilions built around an urbanized village with medieval history traced to the 13th century of Delhi Sultanate reign. It was part of Siri, the second medieval city of India of the Delhi Sultanate of Allauddin Khilji Dynasty (1296–1316). The etymology of the name Hauz Khas in Farsi is derived from the words ‘Hauz’: “water tank” (or lake) and ‘Khas’:“royal”- the “Royal tank”. The large water tank or reservoir was first built by Khilji {the plaque displayed (pictured in the gallery) at the site records this fact} to supply water to the inhabitants of Siri. The tank was de–silted during the reign of Firuz Shah Tughlaq (1351–88). Several buildings (Mosque and madrasa) and tombs were built overlooking the water tank or lake.