Birkau was formerly part of the German Empire. In the German Empire, the place was called Březí.
The place is now called Březí and belongs to Czech Republic.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Birkau | Austro-Hungary | Klattau | before the Treaty of Saint-Germain |
| Březí | Austro-Hungary | Klattau | before the Treaty of Saint-Germain |
| Březí | Czechoslovakia | Klatovy | after the Treaty of Saint-Germain |
| Birkau | Czechoslovakia | Klatovy | after the Treaty of Saint-Germain |
| Birkau | German Empire | Klattau | 1939 |
| Březí | German Empire | Klattau | 1939 |
| Březí | Czechoslovakia | Klatovy | 1945 |
| Březí | Czechoslovakia | Klatovy | 1992 |
| Březí | Czech Republic | Klatovy | 1993 |