WHAT IS THE ACROTERION ?

ACROTERION:  A sculptured figure, tripod, disk, or urn, made of bronze, marble, or terra cotta, placed on the apex of the pediment of a Greek temple or other substantial building.

WHAT IS THE ACROLITH ?

ACROLITH: a Greek statue, of which the head and extremities were of stone or marble and the trunk crafted of wood which was either gilt or draped. The acrolith period was the infancy of Greek plastic art.