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Olszak

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