The Pathar Ki Masjid stands on the bank of river Ganges near the Takht Shri Harmandir Saheb. Parvez Shah, son of Jahangir established Pathar Ki Masjid in 1621.https://patna.bih.nic.in/html/patharkimasjid.htm The structure is built of stone, and so it got its name as Pathar Ki Masjid (...) (from Wikipedia)