Geraldo de Barros was a Brazilian painter and photographer who also worked in engraving, graphic arts, and industrial design. He was a leader of the concrete art movement in Brazil, co-founding Grupo Ruptura and was known for his trailblazing work in experimental abstract photography and modernism. According to The Guardian, De Barros was "one of the most influential Brazilian artists of the 20th century." De Barros is best known for his Fotoformas, a series of photographs that used multiple exposures, rotated images, and abstracted forms to capture a phenomenological experience of Brazil's exponential urbanization in the mid-twentieth century.