1804) Deaths February 12 – Agostino Steffani, composer and diplomat (born 1653) August 15 – Marin Marais, composer and bass-viol player (born 1656) October 8 – Anne Danican Philidor, composer and founder of the Concert Spirituel (born 1681) November 19 – Leopold, Prince of Anhalt-Köthen, employer of Johann Sebastian Bach (born 1694) (smallpox) probable – Gaetano Greco, composer (born c. 1657) 18th century in music Music by year