The Fakhr-ol-dowleh Mosque also known as the Fakhr Mosque, originally named as the Amin-ol-dowleh Mosque, is a Shi'ite mosque on Fakhrabad Street in the Shemiran Gate neighborhood of Tehran, in the province of Tehran, Iran. The mosque was designed by Nikolai Markov and completed in 1949 CE. Princess Fakhr-ol-Dowleh, a daughter of Mozaffar ad-Din Shah Qajar, was the founder of the mosque and named it after her father-in-law, Amin-ol-dowleh. However, the mosque now bears the name of its founder.