Dolgo PoljeDolgo Polje is a district of the City Municipality of Celje and a neighborhood of the city of Celje in central-eastern Slovenia.GeographyDolgo Polje lies at an elevation of approximately, near the Savinja River and its tributaries, including the Hudinja, Ložnica, and Voglajna rivers.NameDolgo Polje was known as Langefeld in German. Both the Slovene and German names mean 'long field'. It was originally an agricultural area divided into selions.