Karolinthal was formerly part of the German Empire. In the German Empire, the place was called Karolinthal.
The place is now called NN and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Karolinthal | Austro-Hungary | Friedland (Isergebirge) | before the Treaty of Saint-Germain |
| Karolinthal | Czechoslovakia | Frýdlant | after the Treaty of Saint-Germain |
| Karolinthal | German Empire | Friedland (Isergebirge) | 1938 |
| Peklo | Czechoslovakia | Frýdlant | 1945 |
| NN | Czechoslovakia | Liberec | 1992 |
| NN | Czech Republic | Liberec | 1993 |