Pir Ghaib, a historic monument in Delhi, is thought to have been built during the reign of Sultan Firoz Shah Tughlaq in the 14th century. Located near Hindu Rao Hospital on the northern ridge of Delhi, this structure served as a hunting lodge and observatory for Firoz Shah, who was an avid patron of architecture and astronomy. The term "Pir Ghaib" translates to "the Saint Who Vanished," and the monument is linked to legends about a Sufi saint who is believed to have disappeared mysteriously, adding an aura of mysticism to the site. The structure itself is characteristic of Tughlaq architecture, with robust stone walls and limited ornamentation. It comprises two stories, with the upper level featuring a pavilion that may have once been used as an astronomical observation point. The building includes a small, arched chamber and a staircase leading to the roof, where it is believed astronomical instruments were positioned. Near Pir Ghaib, remnants of a baoli (stepwell) are also visible, which was likely part of the complex, providing water to the lodge.
