The 1950s and early 1960s are considered by many to be a golden age of Greek cinema. Directors and actors of this era were recognized as important historical figures in Greece and some gained international acclaim: Irene Papas, Melina Mercouri, Mihalis Kakogiannis, Alekos Sakellarios, Nikos Tsiforos, Iakovos Kambanelis, Katina Paxinou, <answer>Nikos Koundouros</answer>, Ellie Lambeti, and others. More than sixty films per year were made, with the majority having film noir elements. Notable films were Η κάλπικη λίρα (1955 directed by Giorgos Tzavellas), Πικρό Ψωμί (1951, directed by Grigoris Grigoriou), O Drakos (1956 directed by <answer>Nikos Koundouros</answer>), Stella (1955 directed by Cacoyannis and written by Kampanellis).
Who directed the movie O Drakos in 1956?
Nikos Koundouros