The Concerto Fantasy for Two Timpanists and Orchestra is a double timpani concerto written by Philip Glass in 2000. It is paired with the Cello Concerto on Vol. I of Glass' Concerto Project, a set of eight concerti by the composer. A typical performance of the work lasts 25–28 minutes.[1] It was written for Jonathan Haas and later recorded by Evelyn Glennie, and was premiered by Haas and Svet Stoyanov with the American Symphony Orchestra in Avery Fisher Hall, Lincoln Center, conducted by Leon Botstein.[2] The work was commissioned jointly by the American Symphony Orchestra, the Peabody Symphony, the Milwaukee Symphony, the St. Louis Symphony and the Phoenix Symphony.[1] In 2004, a transcription for wind ensemble was written by Mark Lortz,[3] which debuted at Peabody Institute in 2005.[4]