The Sāheb ol Amr Mosque (Persian: مسجد صاحب الامر - Masjid-e Sāheb ol Amr) or King Tahmasp Mosque is a mosque located on the east side of Saaheb Aabaad square in Tabriz, Iran. The mosque was initially built in 1636 and has a history of destruction and repair. The name Sāheb ol Amr (Master of command) is one of the titles of the last Twelver Shī‘ah Imām.