The post office at an exposition in Nancy, France, from La Poste : Illustrée par les Cartes Postales, 1900-1925 by Pierre-Stéphane Proust. Find it; buy it; love it.
A neighborhood auxiliary post office in Paris, with postcards!
Interior of the post office in Brie-Comte-Robert, with a dog!
Levecourt celebrates the opening of its post office in 1908.
The post office in Tverkskaya, Moscow, circa 1925, from Memories of a Lost World: Travels through the Magic Lantern by Charlotte Fiell and James R. Ryan