Louis Andriessen (Dutch pronunciation: [luˈi ˈɑndrisə(n)]; 6 June 1939 – 1 July 2021) was a Dutch composer, pianist and academic teacher. Considered the most influential Dutch composer of his generation, he was a central proponent of The Hague school of composition. Although his music was initially dominated by neoclassicism and serialism, his style gradually shifted to a synthesis of American minimalism, jazz and the manner of Stravinsky.
Andriessen taught at the Royal Conservatory of The Hague from 1974 to 2012, influencing notable composers. His opera La Commedia, based on Dante's Divine Comedy, won the 2011 Grawemeyer Award for Music Composition and was selected in 2019 by critics at The Guardian as one of the most outstanding compositions of the 21st century.