Hradečna was formerly part of the German Empire. In the German Empire, the place was called Hradečno.
The place is now called Hradečno and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Hradečna | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Hradečno | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Hradečno | Czechoslovakia | Slaný | after the Treaty of Saint-Germain |
| Burgstätt | German Empire | Schlan | 1939 |
| Hradečno | German Empire | Schlan | 1939 |
| Hradečno | Czechoslovakia | Nové Strašecí | 1945 |
| Hradečno | Czechoslovakia | Kladno | 1992 |
| Hradečno | Czech Republic | Kladno | 1993 |