Háj ve Slezsku was formerly part of the German Empire. In the German Empire, the place was called Freiheitsau.
The place is now called Háj ve Slezsku and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Freiheitsau | Austro-Hungary | Troppau | before the Treaty of Saint-Germain |
| Háj | Austro-Hungary | Troppau | before the Treaty of Saint-Germain |
| Háj | Czechoslovakia | Opava | after the Treaty of Saint-Germain |
| Freiheitsau | German Empire | Troppau | 1938 |
| Háj | Czechoslovakia | Opava | 1945 |
| Háj ve Slezsku | Czechoslovakia | Opava | 1992 |
| Háj ve Slezsku | Czech Republic | Opava | 1993 |