Nova Gorica (; population: 13,852 (
town); 21,082 (
incl. suburbs); 31,000 (
municipality)) is a town and a
municipality in western
Slovenia, on the border with
Italy. Nova Gorica is a
planned town, built according to the principles of
modernist architecture after 1947, when the
Paris Peace Treaty established a new border between
Yugoslavia and Italy, leaving nearby
Gorizia outside the borders of Yugoslavia and thus cutting off the
Soca Valley, the
Vipava Valley, the
Gorizia Hills and the northwestern
Karst Plateau from their traditional regional urban centre. Since 1948, Nova Gorica has replaced Gorizia as the principal urban centre of the
Goriška or
Gorizia region, as the northern part of the
Slovenian Littoral has been traditionally called.