Slovenia, officially the Republic of Slovenia (, ), is a country in southern Central Europe bordering Italy to the west, the Adriatic Sea to the southwest, Croatia to the south and east, Hungary to the northeast, and Austria to the north. The capital of Slovenia is Ljubljana. At various points in Slovenia's history, the country has been part of the Roman Empire, the Duchy of Carantania (only modern Slovenia's northern part), the Holy Roman Empire, the Habsburg Monarchy, the Austrian Empire (later known as Austria-Hungary), the State of Slovenes, Croats and Serbs, the Kingdom of Serbs, Croats and Slovenes (renamed to Kingdom of Yugoslavia in 1929) between the two World Wars, and the Socialist Federal Republic of Yugoslavia from 1945 until gaining independence in 1991. Slovenia is a member of the European Union, the Council of Europe and NATO. History Slavic ancestors of the present-day Slovenians settled in the area