Henri Dutilleux (French: ; 22 January 1916 – 22 May 2013) was a French composer active mainly in the second half of the 20th century. His small body of published work, which garnered international acclaim, followed in the tradition of Maurice Ravel, Claude Debussy, Albert Roussel and Olivier Messiaen, but in an idiosyncratic style.Some of his notable compositions include a piano sonata, two symphonies, the cello concerto Tout un monde lointain… (A whole distant world), the violin concerto L'arbre des songes (The tree of dreams), the string quartet Ainsi la nuit (Thus the night) and a sonatine for flute and piano. Some of these are regarded as masterpieces of 20th-century classical music.