Greek composer and conductor Theodore Antoniou was born in Athens on 10 February 1935. He studied at the National Conservatory of Athens, the Hellenic Conservatory, the Hochschule für Musik and the International Music Centre in Darmstadt.
From 1978 he taught at Boston University in the USA, where he was a composition professor. He also taught at Stanford University, the University of Utah and the Philadelphia Musical Academy.
His compositions used serial techniques and his style was influenced by Jani Christou, Bernd Alois Zimmermann and Krzysztof Penderecki. He wrote over 150 works for theatre and film, with many commissions from orchestras internationally. His orchestral works include The GBYSO Music (1982), Skolion (1986), Paean (1989) and Celebration (1994).
He worked internationally as a conductor with orchestras and smaller ensembles in the USA, Germany, France, Switzerland and Greece. From 1974 until 1985 he was assistant director of contemporary activities at the Tanglewood Music Center in Lenox, Massachusetts, USA.
Theodore Antoniou died in Athens on 26 December 2018, aged eighty-three.