Theusing was formerly part of the German Empire. In the German Empire, the place was called Theusing.
The place is now called Toužim and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Theusing | Austro-Hungary | Tepl | before the Treaty of Saint-Germain |
| Toužím | Austro-Hungary | Tepl | before the Treaty of Saint-Germain |
| Toužím | Czechoslovakia | Teplá | after the Treaty of Saint-Germain |
| Theusing | Czechoslovakia | Teplá | after the Treaty of Saint-Germain |
| Theusing | German Empire | Tepl | 1938 |
| Toužim | Czechoslovakia | Toužim | 1945 |
| Toužim | Czechoslovakia | Karlovy Vary | 1992 |
| Toužim | Czech Republic | Karlovy Vary | 1993 |