Detail of the northern corner of the eastern pediment. The columns of the Parthenon are in the Doric order. The Doric capitals support the architrave and above this is the frieze.
The frieze consists of triglyphs (a grouping of three vertical protrusions) and metopes (the decorated flat spaces between the triglyphs).
There were 92 metopes around the exterior of the building — all decorated in relief. In the corner of the pediment note the head of a horse protruding over the edge and on the north side of the roof note the lion headed sima.
For a brief description of the Parthenon Click Here.