Birkenthal was formerly part of the German Empire. In the German Empire, the place was called Birkental (Westpr.).
The place is now called Brzeźno and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Birkenthal | German Empire | Preußisch Stargard | before the Versailles Treaty |
| Brzeźno (pod Śliwicami) | Poland | Starogard | after the Versailles Treaty |
| Birkental (Westpr.) | German Empire | Preußisch Stargard | 1939 |
| Brzeźno | Poland | Tuchola | 1945 |
| Brzeźno | Poland | Bydgoszcz | 1992 |