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Piaseczno

Piaseczno was formerly part of the German Empire. In the German Empire, the place was called Sieslack.
The place is now called Piaseczno and belongs to Poland.

Historical place name Country Administration Time
Sieslack German Empire Preußisch Eylau 1939
Piaseczno Under Polish administration Górowo Iławeckie 1945
Piaseczno Poland Olsztyn 1992