Rychmburk was formerly part of the German Empire. In the German Empire, the place was called Rychmburk.
The place is now called Předhradí and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Rychmburk | Austro-Hungary | Hohenmauth | before the Treaty of Saint-Germain |
| Richenburg | Austro-Hungary | Hohenmauth | before the Treaty of Saint-Germain |
| Rychmburk | Czechoslovakia | Vysoké Mýto | after the Treaty of Saint-Germain |
| Richenburg | German Empire | Hohenmauth | 1939 |
| Rychmburk | German Empire | Hohenmauth | 1939 |
| Rychmburk | Czechoslovakia | Vysoké Mýto | 1945 |
| Předhradí | Czechoslovakia | Východní Čechy | 1992 |