Op. 18

In music, Op. 18 stands for Opus number 18. Compositions that are assigned this number include:


 * Balakirev – Islamey
 * Beethoven – String Quartets Nos. 1–6, Op. 18
 * Berlioz – Tristia
 * Brahms – String Sextet No. 1
 * Britten – Les Illuminations
 * Chopin – Grande valse brillante in E-flat major
 * Finzi – Let Us Garlands Bring
 * Larsson – A Winter's Tale (En vintersaga), a suite for orchestra (1938)
 * Mendelssohn – String Quintet No. 1
 * Nielsen – Søvnen
 * Oswald – Piano Quintet
 * Rachmaninoff – Piano Concerto No. 2
 * Ries – Violin Sonata No. 9
 * Saint-Saëns – Piano Trio No. 1
 * Schoenberg – Die glückliche Hand
 * Schumann – Arabeske
 * Sibelius – Six Partsongs, collection of choral songs (1893–1901)
 * Strauss – Violin Sonata
 * Tchaikovsky – The Tempest
 * Zdeněk – The Bride of Messina
 * Zemlinsky – Lyric Symphony