Albanian-speakers of Western Thrace migrated towards today's European Turkey (Eastern Thrace), especially near Istanbul. Many Muslim Albanians achieved high office in Ottoman society and many of them, most notably the Köprülü family, became Grand Viziers of the Empire. The majority of the Albanian emigration came from Northern Kosovo and the Korça region of Albania. Descendants of this immigrants would later play an important role in the National Renaissance of Albania. The number of Albanians that resided in the region is unknown, as statistical data of the Ottoman Empire were based on religious identification (millets). Thus, the Orthodox Albanians were part of the Rûm millet,
Turks of Western Thrace multiethnic character of the Muslim minority of Greece, which includes Turks, Pomaks and Roma Muslims, the Government of Greece does not refer to it by a specific ethnic background, nor does recognize any of these ethnicities, including the Turks, as separate ethnic minority in Western Thrace, instead referring to the whole Muslim minority on religious grounds, as the "Muslim Minority of Western Thrace" or "Greek Muslims". This is in accordance with the Treaty of Lausanne to which Greece, along with Turkey, is a signature member. The Lausanne Treaty, along with the Greek Constitution and the Charter of Fundamental Rights of