Breitenfeld (Bz. Posen) was formerly part of the German Empire. In the German Empire, the place was called Breitenfeld (Kr. Jarotschin).
The place is now called Sierszew and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Breitenfeld (Bz. Posen) | German Empire | Jarotschin | before the Versailles Treaty |
| Sierszew | Poland | Jarocin | after the Versailles Treaty |
| Breitenfeld | German Empire | Jarotschin | 1939 |
| Breitenfeld (Kr. Jarotschin) | German Empire | Jarotschin | 1939 |
| Sierszew | Poland | Jarocin | 1945 |
| Sierszew | Poland | Kalisz | 1992 |