Overture is a piece of orchestral music containing contrasting sections played at the beginning of an opera, oratorio, or other dramatic vocal composition.
Overture, sheet music:
Egmont, Op.84 (Ludwig van Beethoven)
The Marriage of Figaro, K.492 (Wolfgang Amadeus Mozart)
THE STONE GUEST. Overture (Alexander Dargomyzhsky)
RUSALKA. OVERTURE (Alexander Dargomyzhsky)
A LIFE FOR THE TSAR (IVAN SUSANIN). OVERTURE (Mikhail Glinka)
RUSLAN AND LYUDMILA. OVERTURE (Mikhail Glinka)
PRINCE IGOR. OVERTURE (Alexander Borodin)