János Antal Friedman known as Yona Friedman, (born June 5, 1923 in Budapest and died December 14, 2019[1] - announced on February 21, 2020[2]​ by the press) was a French architect and urban planner. Known for his theory of mobile architecture.

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Born in Budapest, Hungary, in 1923, to an ethnically Jewish family, which posed problems for him due to anti-Semitic quota laws in universities. Yona Friedman went through World War II escaping Nazi roundups and lived for about a decade in the city of Haifa in Israel before moving permanently to Paris in 1957. He became a naturalized French citizen in 1966.[4]​.

Friedman's work covers urban models, theoretical texts, and animated films. Ha participado en numerosas bienales de arte (Shanghái, Venecia, etc.) y también en la documenta 11 del año 2002 en Kassel, donde exponía Dibujos y modelos.

In 1958 he published the manifesto L'Architecture Mobile, which in turn constituted the founding document of the "Groupe d'étude d'architecture mobile (GEAM)". Develops urban spatial concepts such as "La Ville Spatiale". The ideas in these manifestos were visionary and ahead of their time; Megastructures on existing cities, in which citizens could flexibly reconfigure their future lives, occupied several generations of architects and urban planners. Together with Ionel Schein"), Walter Jonas") and others, he founded the "Groupe International d'Architecture Prospective" (GIAP) in 1965.