Carl Nielsen (1865-1931), was a Danish late romantic and 20th century composer.

Nielsen completed the Flute Concerto in 1926.

Modest Mussorgsky (1839-1881) was a Russian composer of the Romantic period.

The suite ‘Pictures at an Exhibition’ by Mussorgsky was completed as an orcyestral arrangement by Maurice Ravel in 1922.

Franz Schubert (1797-1828), was An Austrian composer of the early romantic era.

Schubert’s Symphony No. 8 was incomplete when he died in 1828. As a result, this work is often referred to as Schubert’s “Unfinished” Symphony.

Wolfgang Amadeus Mozart (1756-1791) was an Austrian composer of the classical period.

The Requiem in D minor, K.626 by Mozart was incomplete upon Mozart’s death in 1791.

Darius Milhaud (1892-1974), was a French modernist composer.

Milhaud completed La Création du monde in 1923.

Zoltán Kodály (1882-1967), was a Hungarian 20th century composer.

Kodály completed Háry János in 1927.

Leoš Janáček (1824-1896), was a Czech composer of the late romantic era.

Janáček completed Sinfonietta in 1926.

Ottorino Respighi (1879-1936) was an Italian 20th century neoclassical/romantic composer.

Pines of Rome (Pini di Roma) was completed in 1924.

Ottorino Respighi (1879-1936) was an Italian 20th century neoclassical/romantic composer.

Fountains of Rome (Fontane di Roma) was completed in 1916.

Alexander Scriabin (1872-1915) was a Russian composer of the Late Romantic period.

Symphony No. 2 by Scriabin was completed in 1902.