Street gallery of assemblage?

Up a side street in a small town in the Cevennes mountains, southern France: A huge door, covered with and surrounded by images and objects - books, photos, drawings and paintings, tools, utensils and ornaments all with no discernible theme. A venerable old portico, hung with baubles of kitch and commercial print. Locals say it changes regularly, but always the same unconnected design. No-one could tell me anything about who created it . . .