By founding the Orchestre des Champs-Élysées in 1991, Philippe Herreweghe provided the French music scene with the quality ensemble playing on original instruments that it lacked. In doing so, the conductor added a new orchestra to his series of ensembles that he had specially designed for the exploration of given musical eras. The Orchestre des Champs-Élysées focuses on symphonic works and oratorios of the Classical and Romantic periods, as well as the classics of the XXth century, performed on the instruments of the respective periods. Several award-winning recordings of works by Mozart and Beethoven, but also Berlioz, Bruckner and Mahler resulted from this initiative. Guest conductors invited by the Orchestre des Champs-Elysées include included Daniel Harding, René Jacobs and Heinz Holliger. This Paris-based orchestra has toured Asia, Australia and the USA and performed in major venues in London, Berlin, Vienna and Amsterdam. Musicological research and educational projects complement the activities of the Orchestre des Champs-Élysées.
When music students from Ghent University formed a choir in 1970 under Philippe Herreweghe, they could not have imagined that they would be among the pioneers of historical performance practice. The professionalisation of this ensemble progressed rapidly, and the choir gained public attention through its collaboration with Gustav Leonhardt and Nikolaus Harnoncourt. The music of Johann Sebastian Bach still form the core of the ensemble's work, but the repertoire extends far beyond to early vocal polyphony or the great choral works of the 19th and 20th centuries. The choir's programmes also include music by Philip Glass and Carl Orff. A vast discography comprising over a hundred recordings, many of which have awarded, bears witness to the choir's extensive activity in various formations and sizes. Since 2017, the Collegium Vocale Gent, which appears in changing configurations and sizes, has also been running its own music festival around Siena.