A singer sings honoring Maria Callas in Athens, Greece, Sept. 15, 2013. The National Opera honors this great artist with a series of music events in downtown Athens, in the occasion of the 36th anniversary of her death, in Sept. 16, 1977. The events took place in several venues, starting at the Acropolis Museum, and then went on at Herdodeum, in Thisio, in Kotzia Square, and finally at the National Archeological Museum.
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