Sandau was formerly part of the German Empire. In the German Empire, the place was called Sandau.
The place is now called Piasek and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sandau | German Empire | Pleß | before the Versailles Treaty |
| Piasek | Poland | Pszczyna | after the Versailles Treaty |
| Sandau | German Empire | Pleß | 1939 |
| Piasek | Poland | Pszczyna | 1945 |
| Piasek | Poland | Katowice | 1992 |