Diyarbekir vilayet

The Vilayet of Diyâr-ı Bekr (Տիգրանակերտի նահանգ, ولايت دياربكر, Vilâyet-i Diyarbakır) was a first-level administrative division (vilayet) of the Ottoman Empire, wholly located within what is now modern Turkey. The vilayet extended south from Palu on the Euphrates to Mardin and Nusaybin on the edge of the Mesopotamian plain. After the establishment of Republic of Turkey in 1923, the region was incorporated into the newly created state.

At the beginning of the 20th century, Diyarbekir Vilayet reportedly had an area of 18074 sqmi, while the preliminary results of the first Ottoman census of 1885 (published in 1908) gave the population as 471,462. The accuracy of the population figures ranges from "approximate" to "merely conjectural" depending on the region from which they were gathered.

History
The Vilayet of Diyarbakir was created in 1867. In 1867 or 1868 Mamuret-ul-Aziz and the Kurdistan Eyalet merged with and joined the Vilayet of Diyarbakir. In 1879–80 Mamuret-ul-Aziz was separated again from the Vilayet of Diyarbakir, and turned into the Vilayet of Mamuret-ul-Aziz. It was one of the six Armenian Vilayets of the Empire.

Administrative divisions
Sanjaks of the vilayet:
 * 1) Diyarbekir Sanjak (Diyarbakır, Lice, Silvan, Derik, Beşiri)
 * 2) Mardin Sanjak (Mardin, Cizre, Midyat, Savur, Nusaybin and maybe Silopi)
 * 3) Ergani Sanjak (Maden, Palu)
 * 4) Siverek Sanjak (Split from Diyarbekir in 1907) (Siverek, Çermik, Viranşehir)

Demographics
The Vilayet was a place in which the Christian population was systematically massacred during World War I during the 1915 genocide in Diyarbekir.