Polje is a former village in the western part of the City Municipality of Ljubljana, the capital of Slovenia. Polje was attested in written sources in 1499 as ecclesiam beate Virginis Marie in Campo. The name of the village was changed from Devica Marija v Polju to Polje in 1952. The name was changed on the basis of the 1948 Law on Names of Settlements and …Polje is a former village in the western part of the City Municipality of Ljubljana, the capital of Slovenia. Polje was attested in written sources in 1499 as ecclesiam beate Virginis Marie in Campo. The name of the village was changed from Devica Marija v Polju to Polje in 1952. The name was changed on the basis of the 1948 Law on Names of Settlements and Designations of Squares, Streets, and Buildings as part of efforts by Slovenia's postwar communist government to remove religious elements from toponyms. In the past the German name was Mariafeld.