Pietro Alessandro Gaspare Scarlatti was an Italian Baroque composer, known especially for his operas and chamber cantatas. He is considered the most important representative of the Neapolitan school of opera.

Baroque music refers to the period or dominant style of Western classical music composed from about 1600 to 1750. The Baroque style followed the Renaissance period, and was followed in turn by the Classical period after a short transition. The Baroque period is divided into three major phases: early, middle, and late. Overlapping in time, they are conventionally dated from 1580 to 1650, from 1630 to 1700, and from 1680 to 1750. Baroque music forms a major portion of the "classical music" canon, and is widely studied, performed, and listened to. The term "baroque" comes from the Portuguese word barroco, meaning "misshapen pearl". The works of George Frideric Handel and Johann Sebastian Bach are considered the pinnacle of the Baroque period. Other key composers of the Baroque era include Claudio Monteverdi, Domenico Scarlatti, Alessandro Scarlatti, Alessandro Stradella, Tomaso Albinoni, Johann Pachelbel, Henry Purcell, Antonio Vivaldi, Georg Philipp Telemann, Jean-Baptiste Lully, Jean-Philippe Rameau, Marc-Antoine Charpentier, Arcangelo Corelli, François Couperin, Johann Hermann Schein, Heinrich Schütz, Samuel Scheidt, Dieterich Buxtehude, Gaspar Sanz, José de Nebra, Antonio Soler, Carlos Seixas and others.