Cluj-Napoca (Romanian pronunciation: [ˈkluʒ naˈpoka] ( listen); German: Klausenburg; Hungarian: Kolozsvár, Hungarian pronunciation: [ˈkoloʒvaːr] ( listen); Medieval Latin: Castrum Clus, Claudiopolis; Yiddish: קלויזנבורג‎, Kloiznburg), commonly known as Cluj, is the second most populous city in Romania, after the national capital Bucharest, and the seat of Cluj County in the northwestern part of the country. Geographically, it is roughly equidistant from Bucharest (324 kilometres (201 miles)), Budapest (351 km (218 mi)) and Belgrade (322 km (200 mi)). Located in the Someșul Mic River valley, the city is considered the unofficial capital to the historical province of Transylvania. From 1790 to 1848 and from 1861 to 1867, it was the official capital of the Grand Principality of Transylvania.