Courland Governorate was one of provinces or governorates of Russian Empire. It was formed in 1795 during Third Partition out of territory of Duchy of Courland and Semigallia. It was bounded in north by Gulf of Riga, Baltic Sea and Governorate of Livonia; west by Baltic Sea; south by Vilna Governorate and Prussia; east by Vitbesk Governorate and Minsk Governorate. The governorate ended in 1915 when German Empire conquered it. Russia surrendered governorate during Treaty of Brest-Litovsk on March 3, 1918.