Mart Stam (1899–1986) was a Dutch architect and designer. At the beginning of his career, he worked for Max Taut, Hans Poelzig and Karl Moser. He became known, among other things, for his backless chair model, the Freischwinger, which he first exhibited in 1927 at the Weißenhofsiedlung in Stuttgart. Together with Hans Schmidt and El Lissitzky he founded the magazine ABC.