Pathar Ki Masjid is also very popular among the local Islamic community. Apart from religious functions this old mosque also serves the purpose being a major landmark of the city. It is said that in the old days many social gatherings were also arranged in and around the Pathar Ki Masjid of Patna.also popularly known as Saif Khan's Mosque, Chimni Ghat Mosque and Sangi Masjid. This beautiful mosque is situated on the bank of river Ganga adjacent to Har Mandir Sahib. Pathar Ki Masjid was established in the year 1621, by Mugal Emperor Jahangir's son Parvez Shah , when he was the governor of Bihar.