Final answer:
The architectural element being referred to in the question is the pediment. It is a triangular space that forms the gable of a pitched roof in classical architecture. The Parthenon is an example of a Greek temple that features pediments with sculptural decoration.
Step-by-step explanation:
The architectural element being referred to in the question is the pediment.
A pediment is a triangular space that forms the gable of a pitched roof in classical architecture. It can be found above the horizontal structure, typically the entablature, of a Greek temple or other classical buildings.
For example, in the Parthenon, a famous Greek temple, the pediment is located at the front and back of the building and contains sculptural decoration.