Sieraków was formerly part of the German Empire. In the German Empire, the place was called Zirkau.
The place is now called Leszno Górne * and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zirkau | German Empire | Sprottau | 1939 |
| Sieraków | Under Polish administration | Szprotawa | 1945 |
| Leszno Górne * | Poland | Zielona Góra | 1992 |