Olsau was formerly part of the German Empire. In the German Empire, the place was called Olsau.
The place is now called Olza and belongs to Poland.
Historical place name | Country | Administration | Time |
---|---|---|---|
Olsau | German Empire | Ratibor | before the Versailles Treaty |
Olza | Poland | Rybnik | after the Versailles Treaty |
Olsau | German Empire | Ratibor (mit Hultschiner Land) | 1939 |
Olza | Poland | Rybnik | 1945 |
Olza | Poland | Katowice | 1992 |