Gertrudes Altschul (1904-1962) was a pioneering Brazilian modernist photographer of Jewish origin who fled Nazi Germany for Brazil in 1939. She was a member of the Foto Cine Clube Bandeirante in São Paulo and experimented with geometric constructions in her photography. A new book and exhibition at the Museu de Arte de São Paulo showcase her work, focusing on themes such as Brazilian architecture, botanical motifs, and still lifes. The publication includes 70 vintage prints and essays by Brazilian and US authors, making it essential for those interested in modern photography.