Koper (Slovene pronunciation: [ˈkoːpəɾ] ( listen)) (Italian: Capodistria; Croatie: Kopar; Serbie: Koper) is a ceety in soothwastren Slovenie, wi the ither Slovenie coastal touns Ankaran, Izola, Piran, an Portorož, situatit alang the kintra's 47-kilometre (29-mile) coastline, in the Istrian Region, approximately five kilometres (3.1 miles) frae its border wi Italy.