Montenegro (/ˌmɒntɪˈneɪɡroʊ, -ˈniːɡroʊ, -ˈnɛɡroʊ/ (listen); Montenegrin: Crna Gora / Црна Гора, lit. 'Black Mountain', pronounced [tsr̩̂ːnaː ɡǒra]) is a country in southeast Europe on the Adriatic coast of the Balkans. It borders Bosnia and Herzegovina to the north, Serbia to the northeast, Kosovo[a] to the east, Albania to the southeast, the Adriatic Sea and Croatia to the west. The largest and capital city Podgorica covers 10.4% of Montenegro's territory and is home to 29.9% of the country's population, while Cetinje has the status of old royal capital. Major group in the country are Montenegrins. Serbs form a significant minority at 28.7%, followed by Bosniaks, Albanians and Croats. During the Early Medieval period, three principalities were located on the territory of modern-day Montenegro: Duklja, roughly corresponding to the southern half; Travunia, the west; and Rascia proper, the north.[10][11][12] The Principality of Zeta emerged in the 14th and 15th centuries. The name Montenegro was first used to refer to the country in the late 15th century. After falling under Ottoman rule, Montenegro regained its independence in 1696 under the rule of the House of Petrović-Njegoš, first as a theocracy and later as a secular principality. Montenegro's independence was recognized by the Great Powers at the Congress of Berlin in 1878. In 1910, the country became a kingdom. After World War I, it became part of Yugoslavia. Following the breakup of Yugoslavia, the republics of Serbia and Montenegro together proclaimed a federation. Following the independence referendum held in May 2006, Montenegro declared its independence and the confederation peacefully dissolved.[13] Classified by the World Bank as an upper middle-income country, Montenegro is a member of the UN, NATO, the World Trade Organization, the Organization for Security and Co-operation in Europe, the Council of Europe, and the Central European Free Trade Agreement. Montenegro is a founding member of the Union for the Mediterranean. It is also in the process of joining the European Union.