Poznan, Poland

Poznan is the fifth largest city of Poland and one of the oldest cities, too.

Krakow, Poland

Cathedral Basilica of St. Stanislaus and St. Wenceslas on Wawel Hill. Krakow, Poland

Siewierz, Poland

Air view postcard and another beautiful stamp from Poland

Warsaw

Warsaw - The Kanonia street

Hala Stulecia and a stamp from Poland

Card from Wroclaw, the capital of Lower Silesian Voivodeship, Poland:

The building on the image in the bottom right corner is the Centennial Hall (or Hala Stulecia), listed as a UNESCO World Heritage Site.

And... just look at the stamp:

This is Israel - Poland Twin issue showing Colonel Berek Joselewicz (1764-1809) on horse with the 5th Jewish Regiment in front of the town Kock.