Thanassis Stephopoulos (Greek: Θανάσης Στεφόπουλος, 1 June 1928 – 29 December 2012) was one of Greece's most important 20th-century painters, teachers and philosophers of art.

In Paris, he studied painting at the École nationale supérieure des Beaux-Arts from 1954 to 1957 under the direction of Maurice Brianchon.

From 1955 to 1957 at the École pratique des hautes études he studied architectural analysis of the ancient Greek style and anecdotal evidence for Delphi with professor Pierre de La Coste-Messelière who was also the department manager.

Many art critics have studied his paintings and in the newspaper Beaux-Arts[3] M.Sauriere wrote: "...la belle nature morte aux oiseaux noirs de Stephopoulos..." In the second period he was evidently in search of freedom.

These quests, which started in 1959, and lasted for over ten years, were exposed for the first time in 1960 in individual exhibitions on "New Forms"[4] and "Astor".