Alan Hovhaness (/hoʊˈvɑːnɪs/;[1] March 8, 1911 – June 21, 2000) was an American composer. He was one of the most prolific 20th-century composers, with his official catalog comprising 67 numbered symphonies (surviving manuscripts indicate over 70) and 434 opus numbers.[2] The true tally is well over 500 surviving works since many opus numbers comprise two or more distinct works.