A French Postcrosser very kindly swapped cards with me so I could begin adding to my UNESCO World Heritage collection. Now I have two cards (so many, many more cards to go, but you have to start somewhere!).
This is the Ville du Roi Stanislas in Nancy, France. I'm told Nancy is in the Northeast part of France with 106,000 inhabitants. Stanislas was a king in Poland and his daughter was married to Louis XV of France. The palace was built between 1751-1755.
You can read more about it here.
And the stamp on the back of the card.