Sadl was formerly part of the German Empire. In the German Empire, the place was called Sadl.
The place is now called Sedlec and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sadl | Austro-Hungary | Bischofteinitz | before the Treaty of Saint-Germain |
| Sedlec | Czechoslovakia | Horšovský Týn | after the Treaty of Saint-Germain |
| Sadl | Czechoslovakia | Horšovský Týn | after the Treaty of Saint-Germain |
| Sadl | German Empire | Bischofteinitz | 1938 |
| Sedlec | Czechoslovakia | Horšovský Týn | 1945 |
| Sedlec | Czechoslovakia | Domažlice | 1992 |
| Sedlec | Czech Republic | Domažlice | 1993 |