Claim: The 1936 International Society for Contemporary Music Festival, which was held in Barcelona, showcased performers from April 19-23, including Leopoldo Querol, Stefan Frankel, and Walter Frey.
Evidence: Held in Barcelona from 19 to 23 April 1936, just three months before the outbreak of the Spanish Civil War, it was one of the last major cultural events of the Second Spanish Republic. Leopoldo Querol, piano; Stefan Frankel, violin
Madrid Symphony – Enrique Fernández Arbós Walter Frey, piano; Stefan Frankel, violin
Madrid Philharmonic – Ernest Ansermet, Bartolomé Pérez Casas and Pedro Sanjuán