Heidau was formerly part of the German Empire. In the German Empire, the place was called Heidau.
The place is now called Płonka and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Heidau | German Empire | Militsch | 1939 |
| Płonka | Under Polish administration | Milicz | 1945 |
| Płonka | Poland | Wrocław | 1992 |