Mart Stam (August 5, 1899 – February 21, 1986) was a Dutch architect, urban planner and designer.

Stam studied in Amsterdam, then worked as a draftsman until 1922. In Zurich in 1923 he met Hans Schmidt, El Lissitzky andABCHannes Meyer and with them founded the abc magazine.

Between 1926 and 1930 he helped design, together with Lendert van der Vlugt, the Van Nelle factory, a manifesto work of a new functionalist trend in the modern movement carried out by a younger and politicized generation than Gropius and the Corbusier, represented by Stam and Hannes Meyer.

Stam, who moves to Germany, is at the centre of european architectural debate and is in the running to become director of the Bauhaus. He designs a famous chair (cantilever chair) in steel tube, provocatively using plumbing pipes and fittings. The chair, with minimal variations, was taken at the Bauhaus, by Ludwig Mies van der Rohe and Marcel Breuer in bent chrome tube, giving rise to long disputes.

Stam participated, in 1927, together with the leading European designers, at the exhibition of the Weissenhof in Stuttgart with a small array of model dwellings.

In 1930 Stam departed with the "May Brigade^[1]" for the USSR to contribute to the urban planning of the new Soviet cities. Stam remained in the Soviet Union, where he met his wife Lotte Beese, until 1934, when he returned to the Netherlands and devoted himself mainly to teaching.