Postcard of the Château de Chambord, part of the Loire Valley UNESCO World Heritage site. It was built to serve as a hunting lodge for François I. Construction began in 1519 and is thought to have been designed, at least partially, by Leonardo da Vinci who was then living in nearby Amboise as a guest of François I. During the Second World War, artwork from the Louvre was kept in the Château for safekeeping.
Permanent rate self-adhesive Mariane in Europe stamps featuring a (rather unlovely) dot matrix cancellation that seems to have become increasingly common of late in France.