Espenthor (Karlsbad-Espenthor) was formerly part of the German Empire. In the German Empire, the place was called Espenthor (Karlsbad-Espenthor).
The place is now called Olšová Vrata (Karlovy Vary-Olšová Vr.) and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Espenthor | Austro-Hungary | Karlsbad | before the Treaty of Saint-Germain |
| Olšova Vrata | Czechoslovakia | Karlovy Vary | after the Treaty of Saint-Germain |
| Espenthor | Czechoslovakia | Karlovy Vary | after the Treaty of Saint-Germain |
| Espenthor (Karlsbad-Espenthor) | German Empire | Karlsbad (St.Kr.) | 1938 |
| Olšová Vrata (Karlovy Vary-Olšová Vr.) | Czechoslovakia | Karlovy Vary | 1945 |
| Olšová Vrata (Karlovy Vary-Olšová Vr.) | Czechoslovakia | Karlovy Vary | 1992 |
| Olšová Vrata (Karlovy Vary-Olšová Vr.) | Czech Republic | Karlovy Vary | 1993 |