In the 7th century, the steppes north of Crimea were part of Old Great Bulgaria,[3][4] a nomadic empire of the Onogur Bulgars.In the 10th century, the so-called Black Bulgars would regularly raid Byzantine possessions in Crimea (the Theme of Cherson) from the north.[5] However, the modern Bulgarian population in Crimea dates to several waves of migration from Ottoman-ruled Bulgaria beginning in the early 19th century.In August 1804, 220 Bulgarians from the Adrianople vilayet landed at Sevastopol and established the village of Kishlav (today Kurske, Bilohirsk Raion).[7] A second wave of migration followed after the Russo-Turkish War of 1828–1829 with around 1,000 colonists[6] from the Varna, Burgas, Sozopol, Pomorie, Tsarevo and Sliven regions.