Piastowice was formerly part of the German Empire. In the German Empire, the place was called Piastenthal.
The place is now called Piastowice and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Groß Piastenthal | German Empire | Brieg | 1914 |
| Piastenthal | German Empire | Brieg | 1939 |
| Piastowice | Under Polish administration | Brzeg m. | 1945 |
| Piastowice | Poland | Opole | 1992 |