Late night Wikipedia-ing:
"At the age of four, [Antonio Sacchini] moved with his family to Naples as part of the entourage of the infante Charles of Bourbon (later to become King Charles III of Spain). The young Sacchini's talent for music caught the attention of Francesco Durante, who enrolled him in the Conservatorio di Santa Maria di Loreto at the age of ten. Here Durante and his assistant Pietrantonio Gallo taught Sacchini the basics of composition, harmony and counterpoint. Sacchini also became a skilled violinist under the tuition of Nicola Fiorenza as well as studying singing under Gennaro Manna. Sacchini was one of the favourite pupils of Durante, a hard teacher to please. It was said that Durante would point out the young Sacchini to his fellow pupils, warning them that he would be a difficult rival to beat and urging them to try to match him, otherwise Sacchini would become the "man of the century." Sacchini was 25 when Durante died in 1755."