Although he lived during the Baroque era, Scarlatti, an Italian composer and virtuoso harpsichordist, was extremely influential in the development of the Classical period of music. He is best known for his composition of 555 keyboard sonatas, written for the Spanish queen Maria Bárbara, whom he had tutored as a child and in whose service he remained for much of his life. Scarlatti is said to have engaged in a keyboard competition with what other composer as a young man? Discuss