Trier, Rheinland-Pfalz, Germany

Stamp: joint issue with Latvia. Theme - Unesco World Heritage Sites. On this stamp we can see Black-roofed house in Riga (Latvia).

Russia/Romania

Joint Russia -Romania stamp issue:))

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.