Book on MusicBetween 1485 and 1492 Cardinal Ascanio Sforza was the recipient of a music treatise composed for him by "Florentius Musicus" (Florentius de Faxolis), who had served him in Naples and Rome. Now in Milan, the richly illuminated small parchment codex bears witness to the musical interests of the cardinal, himself an avid singer taught by Duke Ercole d'Este. Florentius, whose treatise, found in no other source, is edited here for the first time, evidently