Until about 1985 Gilius van Bergeijk was a member of various leading ensembles, including the Willem Breuker Collective, Instant Composer’s Pool, and Orkest de Volharding. He is one of the Netherlands’ most important representatives of “conceptual music”. His ideas have substantially influenced many composers of The Hague School, among whom his colleagues Louis Andriessen and Martijn Padding, and his students Michel van der Aa, Richard Ayres and Huba de Graaff. “Nothing about this Hagueian is as it seems,” wrote Kees Polling in Trouw. The key concept in Van Bergeijk’s music is “deconstruction” and many of his pieces could be thought of as commentary on or phenomena from music history.