Ayreon is a Dutch progressive metal and rock opera group from Waalwijk, North Brabant. He was trained in 1995 by multi-instrumentalist Arjen Anthony Lucassen.
The musical style of Ayreon comes mainly from heavy metal, progressive metal> and power metal>, to which are added other genres such as folk music, classical music and electronic music, creating an original musical genre. The majority of Ayreon's albums are grouped under the name opera-rock in view of the many narrative lines and dialogues spoken or sung by various characters, each represented by a different singer.
The music of Ayreon is characterized by the use of traditional instruments of rock (guitar, bass, drums, synthesizer, electric organ) mixed with instruments coming more from the folk and the classical music (mandolin, violin, cello, double bass, flute , sitar and didgeridoo).
Lucassen is an author, composer, singer and multi-instrumentalist on Ayreon's albums. He is accompanied by many other musicians and singers.