His first major work, the sacred drama La conversione di San Guglielmo d'Aquitania, began a string of successes that included the operas La Salustia, Adrian in Syria, and L'Olimpiade.  
At the age of 16 he started studying under the trio of Gaetano Greco, Francesco Feo, and Francesco Durante.  His reputation for genius gained him a commission from the fraternity of San Luigi di Palazzo for a Stabat Mater to replace one by Alessandro Scarlatti.  His first major work, the sacred drama La conversione di San Guglielmo d'Aquitania, began a string of successes that included the operas La Salustia, Adrian in Syria, and L'Olimpiade.  FTP, name this 18th-century Italian, who composed the first important opera buffa with his La Serva Padrona.
At the age of 16 he started studying under the trio of Gaetano Greco, Francesco Feo, and Francesco Durante.  
Giovanni Pergolesi