Jean Sibelius (1865-1957), was a Finnish late romantic composer.

SSibelius completed Symphony No. 7 in 1924.

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

Nielsen completed Symphony No. 4 in 1916.

Alban Berg (1885-1835), was a 20th Century Austrian composer.

Berg completed the Chamber Concerto in 1925.

Béla Bartók (1841-1904), was a 20th century Hungarian composer.

Bartók completed Concerto for Orchestra in 1943.

Maurice Ravel (1875-1937), was a French composer of Impressionist and Early 20th Century music.

Ravel completed Piano Concerto for the Left Hand in 1930.

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

Nielsen completed Symphony No. 2 in 1902.

Richard Wagner (1813-1883), was a German composer of the Romantic era.

Wagner completed The Flying Dutchman (Der fliegende Holländer) in 1870.

Nikolai Rimsky-Korsakov (1844-1908), was a Russian composer of the Romantic era.

Rimsky-Korsakov completed The Golden Cockerel in 1907.