Sazena was formerly part of the German Empire. In the German Empire, the place was called Sazená.
The place is now called Sazená and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Sazena | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Sázené | Austro-Hungary | Schlan | before the Treaty of Saint-Germain |
| Sazená | Czechoslovakia | Kralupy nad Vltavou | after the Treaty of Saint-Germain |
| Sasena | German Empire | Kralup an der Moldau | 1939 |
| Sazená | German Empire | Kralup an der Moldau | 1939 |
| Sazená | Czechoslovakia | Kralupy nad Vltavou | 1945 |
| Sazená | Czechoslovakia | Kladno | 1992 |
| Sazená | Czech Republic | Kladno | 1993 |