Charles Rosen (born May 5, 1927) is an American pianist and music theorist.

Rosen has carried out a double career. As a virtuoso pianist he has appeared in numerous recitals and orchestral engagements around the world, and has recorded a number of 20th century works at the invitation of their composers, including works by Igor Stravinsky, Elliott Carter, and Pierre Boulez.

Rosen is also the author of many widely admired books about music. Perhaps his most famous work is The Classical Style (2nd ed., 1997, New York: Norton), which analyzes the nature and evolution of the high classical style as it was developed by Joseph Haydn, Wolfgang Amadeus Mozart and Ludwig van Beethoven. Sonata Forms (2nd ed., 1988, New York: Norton) is in some ways a follow-up on The Classical Style; it is an intensive analysis of the primary musical form used in the classical era. The Romantic Generation (1998, Cambridge: Harvard University Press) covers the work of the early generation of Romantic composers, including Frederic Chopin, Franz Liszt, Robert Schumann, and Felix Mendelssohn. Other books on music by Rosen are the following:

• The Musical Languages of Elliott Carter (1984. Washington, D.C.: Music Division, Research Services, Library of Congress)
• The Frontiers of Meaning: Three Informal Lectures on Music (1994. New York: Hill and Wang)
• Arnold Schoenberg (1996. Chicago: University of Chicago Press)
• Beethoven's Piano Sonatas: A Short Companion (2001, New Haven: Yale University Press)
• Critical Entertainments: Music Old and New (2001. Cambridge: Harvard University Press)
• Piano Notes: The World of the Pianist (2002: Free Press)

The polymathic Rosen has also published in other areas of the humanities:

• Romanticism and Realism: The Mythology of Nineteenth-Century Art (with Henri Zerner; 1985. New York: Norton)
• Romantic Poets, Critics, and Other Madmen (2000. Cambridge: Harvard University Press)

Rosen has from time to time held positions as a university professor. He holds a Ph.D. in French Literature from Princeton University, and has taught at Harvard, Oxford University, and the University of Chicago.

Books

• Arnold Schoenberg: ISBN 0691027064
• Beethoven's Piano Sonatas: A Short Companion: ISBN 0300090706
• The Classical Style: ISBN 0393317129
• Critical Entertainments: Music Old and New: ISBN 0674006844
• The Frontiers of Meaning: ISBN 187108265X
• The Musical Languages of Elliott Carter:
• Piano Notes: The World of the Pianist: ISBN 0743243129
• Romanticism and Realism: ISBN 0393301966
• Romantic Poets, Critics, and Other Madmen: ISBN 0674779517
• The Romantic Generation: ISBN 0674779347
• Sonata Forms: ISBN 0393302199

Charles Rosen (died December 6 2002) was a pioneer in artificial intelligence.