Seemühl (Tremessen-Seemühl) was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Bystrzyca (Trzemeszno-Bystrzyca) and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Seemühl (Tremessen-Seemühl) | German Empire | Mogilno | before the Versailles Treaty |
| Bystrzyca | Poland | Mogilno | after the Versailles Treaty |
| NN | German Empire | Mogilno | 1939 |
| Bystrzyca | Poland | Mogilno | 1945 |
| Bystrzyca (Trzemeszno-Bystrzyca) | Poland | Bydgoszcz | 1992 |