Sielec, Dwór was formerly part of the German Empire. In the German Empire, the place was called Podau.
The place is now called Sielec * and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sielec | German Empire | Znin | before the Versailles Treaty |
| Sielec, Dwór | Poland | Żnin | after the Versailles Treaty |
| Podau | German Empire | Dietfurt (Wartheland) | 1939 |
| Sielec * | Poland | Żnin | 1945 |
| Sielec * | Poland | Bydgoszcz | 1992 |