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,
Albanian-speakers of Western Thrace Albanian-speakers of Western Thrace Albanian-speakers form a linguistic minority in Greek Macedonia and Western Thrace along the border with Turkey. They speak the Northern Tosk subbranch of Tosk Albanian and are descendants of the Albanian population of Eastern Thrace who migrated during the Population exchange between Greece and Turkey in the 1920s. They are known in Greece as Arvanites, a name applied to all groups of Albanian origin in Greece, but which primarily refers to the southern dialectological group of "Arbëreshë". The Albanian-speakers of Western Thrace and Macedonia use the common Albanian self-appellation, "Shqiptar". During the Ottoman Empire, Albanian communities