Montenegro is a country in Southeast Europe on the Adriatic Sea. It borders Bosnia and Herzegovina to the northwest; Serbia and Kosovo to the east, Albania to the south and Croatia to the west. The country's name derives from Venetian and translates as "Black Mountain", deriving from the appearance of Mount Lovćen when covered in dense evergreen forests. In the 9th century, three Slavic principalities were located on the territory of Montenegro: Duklja, Travunia, and Rascia. The status of the union between Montenegro and Serbia was decided by a referendum on Montenegrin independence on 21 May 2006 which ended in independence by a narrow majority.