NN was formerly part of the German Empire. In the German Empire, the place was called NN.
The place is now called Płaczki * and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Placzki, Gutsbezirk | German Empire | Schroda | before the Versailles Treaty |
| Płaczki, Dwór | Poland | Środa | after the Versailles Treaty |
| NN | German Empire | Schroda | 1939 |
| Płaczki * | Poland | Środa | 1945 |
| Płaczki * | Poland | Poznań | 1992 |