Franz Joseph Weissmann (Knittelfeld, Austria, 1911 - Rio de Janeiro, RJ, 2005) was a sculptor, draftsman, painter, and professor. He moved to Brazil in 1921. In Rio de Janeiro, between 1939 and 1941, he attended courses in architecture, sculpture, painting, and drawing at the National School of Fine Arts (Enba). From 1942 to 1944, he studied drawing, sculpture, modeling, and casting with August Zamoyski (1893-1970). In 1945, he moved to Belo Horizonte, where he gave private drawing and sculpture classes. Three years later, Guignard (1896-1962) invited him to teach sculpture at the School of the Park, later named Guignard School. Initially, his work was figurative. Starting in the 1950s, he gradually developed a constructivist approach, emphasizing geometric forms, subjecting them to cuts and folds, using iron plates, steel wires, and bent or flat aluminum. He joined the Grupo Frente in 1955. The following year, he moved back to Rio de Janeiro and participated in the National Exhibition of Concrete Art in 1957. He was one of the founders of the Neoconcrete Group in 1959. That year he traveled to Europe and the Far East, returning to Brazil in 1965. In the 1960s, he exhibited the "Amassados" series, made in Europe with zinc or aluminum sheets worked with hammers, bludgeons, and cutting tools, temporarily aligning with informalism. Later, he returned to constructive approaches. In the 1970s, he received the award for best sculptor from the São Paulo Association of Art Critics (APCA), participated in the International Open Air Sculpture Biennial in Antwerp, Belgium, and the Venice Biennale. He created monumental sculptures for public spaces in various Brazilian cities, such as in Praça da Sé, São Paulo; Catacumba Park, Rio de Janeiro; and the Palácio das Artes, Belo Horizonte.