Pień was formerly part of the German Empire. In the German Empire, the place was called Pien.
The place is now called NN and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Pien | German Empire | Kulm | before the Versailles Treaty |
| Pień | Poland | Chełmno | after the Versailles Treaty |
| Pien | German Empire | Kulm (Weichsel) | 1939 |
| Pień | Poland | Chełmno | 1945 |
| NN | Poland | Bydgoszcz | 1992 |