Piotrowo was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Piotrowo and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Piotrowo | Russian Empire | Konin | 1914 |
| Piotrowo | Poland | Konin | 1921 |
| NN | German Empire | Konin | 1939 |
| Piotrowo | Poland | Słupca | 1945 |
| Piotrowo | Poland | Konin | 1992 |