From the New Grove Dictionary of Music and Musicians we read:

He was taken from Florence to Paris in 1646 by Roger de Lorraine, Chevalier de Guise, who placed him in the service of his niece, Mlle de Montpensier. At her court in the Tuileries Lully got to know the best in French music and, despite his patroness's dislike of Mazarin and her involvement in the Fronde, he was no stranger to Italian music either. After the defeat of the Frondists, Mlle de Montpensier was exiled to St. Fargeau. Lully obtained release from her service and on the death of his friend Lazzarini, in 1653, was appointed Louis XIV's compositeur de la musique instrumentale..

From 1655 his fame as dancer, comedian and composer grew rapidly, and his disciplined training of the king's 'petite bande' earned him further recognition. In 1661 he was made surintendant de la musique et compositeur de la musique de la chambre and in 1662 maître de la musique de la famille royale. By then he was a naturalized Frenchman, and in July 1662 he married Madeleine, daughter of the composer Michel Lambert.

 Lully then collaborated with Molière on a series of comédies-ballets which culminated in Le bourgeois gentilhomme (1670). After that he turned to opera, securing the privilege previously granted to Perrin and forestalling potential rivals with oppressive patents granted by the king. He chose as librettist Philippe Quinault, with whom he succeeded in establishing a new and essentially French type of opera known as tragédie lyrique. Between 1673 and 1686 Lully composed 13 such works, 11 of them with Quinault.

During this time Lully continued to enjoy the king's support, despite Louis' displeasure at his overt homosexual behaviour and the resentment his high-handedness provoked in other musicians. His greatest personal triumph came in 1681 when in an impressive ceremony he was received as secrétaire du Roi. After the king's marriage to Mme de Maintenon in 1683 life at court took on a new sobriety; it was perhaps in response to this that Lully composed much of his religious music. During a performance of his Te Deum in January 1687 he injured his foot with the point of a cane he was using to beat time. Gangrene set in, and within three months he died, leaving a tragédie lyrique, Achille et Polyxène, unfinished.

At his death Lully was widely regarded as the most representative of French composers. Practically all his music was designed to satisfy the tastes and interests of Louis XIV. The ballets de cour (1653-63) and the comédies-ballets (1663-72) were performed as royal entertainments, the king himself often taking part in the dancing. The tragédies lyriques (1673-86) were kingly operas par excellence, expressing a classical conflict between la gloire and l'amour; Louis himself supplied the subject matter for at least four of them and certainly approved the political sentiments of the prologues. Lully's music was correspondingly elevated, in the stately overtures, the carefully moulded 'récitatif simple' and the statuesque choruses; many of the airs, too, draw as much attention to the galant mores of the court as to the stage action. Finally, the Versailles grand motet, of which the Miserère is an outstanding example, was designed to glorify the King of France as much as the King of Heaven.

The ballet Le Carnaval Mascarade de Versailles is a ballet which first appeared in 1668 for seven entrees on which he collaborated with the poet Isaac de Benserade.  A second version appeared in 1675 with nine entrees, on which he collaborated with the dramatist Moliere, Benserade, and Philippe Quinault. The nine movement version appears on tonight’s program and represents the culmination of the style of the new ballet for which Lully was so well known during his lifetime.