Alan Simon is a French folk-rock musician and composer, best known for his rock operas performed with noted rock musicians guesting. Simon is associated with Breton Celticism, and his most ambitious works are typically on themes linked to Celtic myth and history. Simon achieved fame with his rock opera Excalibur, La Légende des Celtes (Excalibur, The Legend of the Celts) (Sony) in 1999, of which he was both songwriter and producer. The first part of an intended trilogy, Excalibur blended musical styles and was performed by Roger Hodgson (ex-Supertramp), Fairport Convention, Dan Ar Braz, Tri Yann, Angelo Branduardi, Didier Lockwood and Gabriel Yacoub. Within weeks, the album went top 10 and gold in France. Five concert performances took place between October 1999 and June 2000, including one at Paris-Bercy. A live recording, released as Excalibur, le concert mythique (Excalibur, the legendary concert) (CD and DVD) was recorded at the first performance in Rennes, October 12, 1999.