Adrianople vilayet
The Vilayet of Adrianople or Vilayet of Edirne (; "Vilâyet-i Edirne") was a first-level administrative division (vilayet) of the Ottoman Empire. This vilayet was split between Turkey and Greece in 1923, culminating in the formation of Western and Eastern Thrace after World War I as part of the Treaty of Lausanne. A small portion of the Vilayet was given to Bulgaria in the Treaty of Bucharest (1913) after the Balkan wars. In the late 19th century it reportedly had an area of . In the east it bordered with the Istanbul Vilayet, the Black Sea and the Sea  of Marmara, in the west with the Salonica Vilayet, in the north with Eastern Rumelia (Bulgaria since 1885) and in the south with the Aegean Sea. Sometimes the area is described also as Southern Thrace, or Adrianopolitan Thrace. After the city of Adrianople (Edirne in Turkish; pop. in 1905 about 80,000), the principal towns were Rodosto (now Tekirdağ) (35,000), Gelibolu (25,000), Kırklareli (16,000), İskeçe (14,000), Çorlu (11,500), Dimetoka (10,000), Enez (8000), Gümülcine (8000) and Dedeağaç (3000). Administrative divisions. Sanjaks of the Vilayet: Demographics. Total population of the Adrianople Vilayet (including Eastern Rumelia) in 1878 according to the Turkish author Kemal  Karpat: Population of the groups of the Vilayet and Sanjaks according to the Ottoman census in 1906/7, in thousands, adjusted to round numbers. The groups are counted according to the Millet System of the Ottoman Empire not according to the mother tongue, some Bulgarian-speakers were part of the Greek Rum millet and counted as Greeks, while the Muslim millet included Turks and Pomaks (Bulgarian speaking Muslims). A publication from December 21, 1912, in the Belgian magazine "Ons Volk Ontwaakt" (Our Nation Awakes) estimated 1,006,500 inhabitants: Sanjak of Filibe. Male population of the Filibe Sanjak of the Adrianople Vilayet in  1876 according to the British R. J. Moore: Sanjak of İslimiye. Male population of İslimiye sanjak of Adrianople Vilayet in 1873 according to Ottoman almanacs: Male population of İslimiye sanjak of Adrianople Vilayet in 1875 according to British R.J. Moore: Sanjak of Gümülcine. Total population of the Sanjak of Gümülcine of the Adrianople Vilayet In the 19th century: