I believe the correct answer is ornate vertical columns.
The Ancient Greek architecture is distinct for its trabeated system (also known as past and lintel), the use of horizontal beams or lintels which are borne up by columns. The vertical of the temple support a structure that rises in two main stages – entablature and the pediment. Ornamentation of the columns was done in three different styles the Doric style (simple circular capitals), the Ionic style (use of volutes) and the Corinthian style (floral ornaments). For example: Temple of Portunus (Ionic style), The Parthenon (Doric style) and The Pantheon (Corinthian style).