Hans Schmidt (1893–1972) was a Swiss architect and graphic designer. With numerous residential and housing estate buildings, he became a leading representative of the "Neues Bauen" movement. He was one of the founders of CIAM and co-editor of the magazine ABC.

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.

El Lissitziky (1890-1941) was a Russian architect and painter, who from 1919/20 onwards was involved with Suprematism. Between 1919 and 1927 he produced a large body of paintings, prints, and drawings that he referred to by the word Proun, an acronym for "project for the affirmation of the new" in Russian. The term Proun was conceived by Lissitzky in 1919 specifically to signify his turn to non-objective art. Lissitzky’s versatile body of work includes poster and theater set design, typography, and architecture. It reflects his training as an architect in Germany before World War I as well as the inspiration of Kazimir Malevich, a fellow teacher at the Vitebsk art school.

Emil Roth (1893–1980) was a Swiss architect and co-founder of the magazine ABC. He was involved in the Werkbundsiedlung Neubühl project in Zurich and El Lissitzky's "Wolkenbügel" – a never-realized series of buildings over major intersections in Moscow, intended as an antithesis to the capitalist skyscraper.