Olszak was formerly part of the German Empire. In the German Empire, the place was called Olsen.
The place is now called Olszak and belongs to Poland.
Historical place name | Country | Administration | Time |
---|---|---|---|
Olszak | Russian Empire | Kolo | 1914 |
Olszak | Poland | Koło | 1921 |
Olsen | German Empire | Warthbrücken | 1939 |
Olszak | Poland | Koło | 1945 |
Olszak | Poland | Konin | 1992 |