The featured structure in this picture is the Odeon, or theater, in the foreground. In the high background is the Parthenon, the temple of Athena Parthenos, guardian and namesake of the city.

The description is short:
ATHENS: The Odeon of Herode Atticos
The name is more commonly spelled Herodes Atticus. This card was used, and is dated 4 June 1977.