Esmahan Sultan Mosque is the oldest mosque in Romania. Located in Mangalia, Constanța County, it serves a community of 800 Muslim families, most of them of Turkish and Tatar ethnicity. Esmehan Sultan Mosque was constructed in 1575 by its namesake, Ismihan, the daughter of Ottoman Sultan Selim II and Nurbanu Sultan, and wife of Ottoman Grand Vizier Sokollu Mehmed Pasha.