Rosenburg was formerly part of the German Empire. In the German Empire, the place was called Rosenburg.
The place is now called Białokosz and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Bialokosch | German Empire | Birnbaum | before the Versailles Treaty |
| Białokosz, Dwór | Poland | Międzychód | after the Versailles Treaty |
| Rosenburg | German Empire | Birnbaum (Wartheland) | 1939 |
| Białokosz | Poland | Międzychód | 1945 |
| Białokosz | Poland | Poznań | 1992 |