On Monday I got two postcards from France.
One of them shows the Château de Boulogne-sur-Mer. The Château de Boulogne-sur-Mer was built in the 13th century. Since 1988 it houses the Boulogne-sur-Mer Museum.
With a nice stamp:
EUROPA (issued 16-05-2017)
with a special postmark from the philatelic shop in Boulogne-sur-Mer
Thank You very much William!