S├ębastien de Brossard, an enthusiastic collector of music, pedagogue and author of the first dictionary of music, was also a very talented composer. This champion of Italian music and great connoisseur of the music of Carissimi probably took the Roman master as the model for his two oratorios. Leandro, a dramatic work in Italian, is a miniature masterpiece and one of the earliest cantatas by a French composer.