Like almost everything else today, the humble postcard isn’t what it used to be. In early 20th-century Paris, for instance, a photographer known as Yvon, born Pierre Yves Petit, turned out simple postcards with scenic views of his city that today class him as a true flâneurd’entre-guerreParis along with Eugène Atget, Brassaï and André Kertész.
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