Overture

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An overture (from French ouverture, lit. "opening") is an instrumental piece of music that is written to introduce a dramatic work such as a ballet, opera, or oratorio. During the early Romantic era, composers such as Beethoven and Mendelssohn composed overtures which were independent, self-existing, instrumental, programmatic works that foreshadowed genres such as the symphonic poem. These were "at first undoubtedly intended to be played at the head of a programme". The idea of an instrumental opening to opera existed during the 17th century. Peri's Euridice opens with a brief instrumental ritornello, and Monteverdi's L'Orfeo (1607) opens with a toccata, in this case a fanfare for muted trumpets. More important was the prologue, consisting of sung dialogue between allegorical characters which introduced the overarching themes of the stories depicted.

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