Gaspare Luigi Pacifico Spontini (14 November 1774 – 24 January 1851) was an Italian opera composer and conductor.
Born in Maiolati, Papal State (now Maiolati Spontini, Province of Ancona), he spent most of his career in Paris and Berlin, but returned to his place of birth at the end of his life. During the first two decades of the 19th century, Spontini was an important figure in French opera. In his more than twenty operas, Spontini strove to adapt Gluck's classical tragédie lyrique to the contemporary taste for melodrama, for grander spectacle (in Fernand Cortez for example), for enriched orchestral timbre, and for melodic invention allied to idiomatic expressiveness of words.
As a youth, Spontini studied at the Conservatorio della Pietà de' Turchini, one of four active music conservatories of Naples. Working his way from Italian city to city, he got his first break in Rome, with his successful comedy Li puntigli delle donne (Carnival 1793). In 1803, he went to Paris, where; on February 11, 1804, debuted his comic opera La finta filosofa, his Neapolitan success of 1799. In part on the recommendation of the comte de Rémusat and his literary countess, a dame du palais, Spontini circulated in the Imperial court, was made a member of the Académie Impériale de Musique and gained a court position as compositeur particulier de la chambre of the Empress in 1805.
Though Spontini's earlier successes were comedies, with the encouragement of Empress Joséphine in 1807, Spontini wrote his greatest success, the tragédie lyrique La vestale, which has remained his best known work. Its premiere at the Opéra in Paris established Spontini as one of the greatest Italian composers of his age. His contemporaries Cherubini and Meyerbeer considered it a masterpiece, and later composers such as Berlioz and Wagner admired it.