Obra Stara was formerly part of the German Empire. In the German Empire, the place was called Alt Obra.
The place is now called Obra Stara and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Alt-Obra | German Empire | Koschmin | before the Versailles Treaty |
| Obra Stara | Poland | Krotoszyn | after the Versailles Treaty |
| Alt Obra | German Empire | Krotoschin | 1939 |
| Obra Stara | Poland | Krotoszyn | 1945 |
| Obra Stara | Poland | Kalisz | 1992 |