Zahn was formerly part of the German Empire. In the German Empire, the place was called Zahn.
The place is now called Czarna and belongs to Poland.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Zahn | German Empire | Grünberg i. Schles. | 1939 |
| Czarna | Under Polish administration | Zielona Góra | 1945 |
| Czarna | Poland | Zielona Góra | 1992 |