Leonora (opera), the original title of Ludwig van Beethoven's opera Fidelio, in which the heroine is named Leonora (or Leonore in German)
Leonora (opera) by William Henry Fry (the first known performance of an opera by an American composer on March 18, 1845)
Leonora (opera), the 1804 opera by Ferdinando Paer based on the same source as the work by Beethoven
Leonora, heroine of the opera Il trovatore, the 1853 opera by Giuseppe Verdi based on the 1836 drama El trovador by Antonio García Gutiérrez
Leonora, heroine of the opera La forza del destino, the 1862 opera by Giuseppe Verdi based on the 1835 drama Don Álvaro o la fuerza del sino by Ángel de Saavedra, 3rd Duke of Rivas
Leonora, another name for Lenore (ballad), by Gottfried August Bürger
