“Persepolis” is the longest electroacoustic composition by IANNIS XENAKIS (1922-2001) who ranks among the most influential 20th century avantgarde composers. Commissioned by the Persian Shah, the piece was part of a multimedia performance – XENAKIS’ so-called “polytopes” – which premiered in 1971 in Shiraz-Persepolis (Iran) as a performance including light-tracks, laser beams, groups of children walking around with torches and 59 loudspeakers to project the music in an open-air situation. XENAKIS had realized “Persepolis” on 8-track analogue tape in the Studio Acusti in Paris and released a stereo reduction on vinyl in the famous Philips series “Prospective 21e Siècle” in 1972, adding the new subtitle “We bear the light of the earth”, his most hymnal title ever.