Generally referred to as the father of classical music; called the creator of modern opera, and was one of the greatest lights of the Italian School of the Seventeenth Century, which had so decided an influence upon operatic music. Scarlatti was remarkable as a composer of oratorio and opera. He revolutionized orchestration, originated the recitative, and is generally credited with having invented the aria, although some authorities assort that he merely made the aria the most conspicuous feature of his operas, and that he did not invent it. He was a great and famous teacher, as well as a prolific and gifted composer. At least thirteen of his pupils attained great renown in Europe as operatic composers, and with Scarlatti compose the far-famed Neapolitan School, which established the rules that controlled all Italian Opera in the Eighteenth Century. He was known to his contemporaries not only as the greatest musical genius but as the most learned student of the age. The Italians speak of him as the glory of the art and the chief of composers. Hasse, one of his most famous pupils, said of him, that in point of harmony, Scarlatti was the greatest master of Italy. He was the forerunner of Gluck and Mozart, and has been compared by Hauptmann to Palestrina as Virgil has been compared to Homer. Few details of the life of the great master are known, although a fairly accurate record of his musical activity has been kept. It is generally believed that Scarlatti was a pupil of Carissimi at Rome. Whether this is true or not, he was certainly a follower of the older master, and continued Carissimi's work of combining the principles of the great Roman contrapuntal school of Palestrina.
His early years are believed to have been spent mostly in northern Italy, where he early gave promise of the great musical ability which was afterwards to distinguish him. He became a skilled pianist, organist and harpsichord-player, and it is said by some auhtorities that it was his ability as a performer on the harpsichord that led to his meeting Carissimi. In Florence he was under the protection of Ferdinand III., son of the Grand Duke of Tuscany, being employed by him to write operas. Pompeo was produced at the Royal Palace of Naples in 1684, at which time Scarlatti directed the performance. This was his first attempt at a serious opera, and according to E. J. Dent, author of the most complete biography of the composer, the three operas, Gli Equivoci, L'Honesta, and Pompeo, are all that remain to represent Scarlatti's first period of dramatic composition. La Rosaura and La Statire were performed at Rome and Naples in 1690 and appear to have been successful. The libretto of the latter was written by the composer's friend and patron, Cardinal Ottoboni, whose service Scarlatti later entered. In 1694 he was appointed chapelmaster to the Viceroy of Naples, but in 1703 he went to Rome, where he was appointed assistant musical director of the Church of Santa Maria Maggiore. Four years later, upon the death of Antonio Foggia, he was made director, and about the same time was also appointed private chapelmaster to Cardinal Ottoboni. He remained in Rome until 1721, and in that year composed a pastorale, at the request of the Portuguese ambassador, to celebrate the elevation of Innocent XIII. to the papal chair.
In Rome, Scarlatti produced the operas, II Caduta in 1706 and II Trionfo in 1707. The latter is the composer's one comic opera, and is similar in plot to Don Giovanni. He also wrote many oratorios and sacred cantatas, while in Rome, mostly for performance at the yatican. From Rome he went to Venice and Ferrara and to Urbino, where he seems to have met with financial difficulties. He returned to Naples in the last years of his life, as master of the Royal Chapel, a post he held until his death in 1725.
While at Naples he produced Pirro e Demetro; II Prigionero Fortunato; Laodicia e Berenice and other works. Pirro was first given in 1694 and it was a great success, being performed in various cities of Italy, and in London in 1708, when, with some additional airs and an overture composed by Haydn, it was translated into English and given at the Haymarket Theatre, being the only one of Scarlatti's operas to be performed in its entirety in an English-speaking country. It is said to be his finest work.