Hauz-i-Shamsi (Persian: شمئ حوض, literally "sunny watertank") is a water storage reservoir or tank built by Iltutmish of the Slave Dynasty in 1230 CE, at a location revealed to him in a dream by the Islamic prophet Muhammad. A palace called the Jahaz Mahal was built on the eastern edge of the same reservoir during the Lodi dynasty period in the 16th century as a retreat or Inn for use by pilgrims. Also at the edge of Hauz is the tomb of 17th century Persian writer in the Mughal court, Abdul-Haqq Dehlavi.