Dolga gora was formerly part of the German Empire. In the German Empire, the place was called Langenberg.
The place is now called Dolga Gora and belongs to Slovenia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Langenberg | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Dolga Gora | Austro-Hungary | Cilli/Celje | before the Treaty of Saint-Germain |
| Dolga gora | Yugoslavia | Šmarje | after the Treaty of Saint-Germain |
| Langenberg | German Empire | Cilli | 1941 |
| Dolga gora | Yugoslavia | Celje | 1945 |
| Dolga Gora | Yugoslavia | Socialistična rep. Slovenija | 1992 |
| Dolga Gora | Slovenia | Slowenien | 1991 |