Frédéric Joliot, André Debierne and Irène Joliot-Curie, from left to right, during the lab's party for the Nobel prize in chemistry awarded to the Joliot-Curies in 1935. This is the only one picture with the three successors to Marie Curie as directors of the Radium Institute of Paris, between 1934 and 1958 (source : Musée Curie ; coll. ACJC ; MCP1163).