John H. Edelmann (1852–1900) was a socialist-anarchist who worked as an architect in the office of Alfred Zucker, a successful commercial architect of the 1880s and 1890s in  New York City. As an architect, Edelmann's sole surviving monument is the former headquarters of the Decker Brothers Piano Company, the Decker Building (1893), at 33 Union Square West, New York. Louis Sullivan was influenced by his work with Edelmann and credits Edelmann's concept of "suppressed function" with the inspiration for his maxim, "Form follows function," a watchword of Modernism.