Posen was formerly part of the German Empire. In the German Empire, the place was called Posen.
The place is now called Poznań and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Posen | German Empire | Posen (St.Kr.) | before the Versailles Treaty |
| Poznań | Poland | Poznań m. | after the Versailles Treaty |
| Posen | German Empire | Posen (St.Kr.) | 1939 |
| Poznań | Poland | Poznań m. | 1945 |
| Poznań | Poland | Poznań | 1992 |