acroterium

An acroterion or acroterium is an architectural ornament placed on a flat base called the acroter or plinth, and mounted at the apex of the pediment of a building in the Classical style. It may also be placed at the outer angles of the pediment; such acroteria are referred to as acroteria angularia. The acroterion may take a wide variety of forms, such as a statue, tripod, disc, urn, palmette or some other sculpted feature. Acroterion is found in both gothic and classical architecture.
See more at Wikipedia.org...

(n.)
One of the small pedestals, for statues or other ornaments, placed on the apex and at the basal angles of a pediment. Acroteria are also sometimes placed upon the gables in Gothic architecture.
  

(n.)
One of the pedestals, for vases or statues, forming a part roof balustrade.
  

N
projection; ornament at angle of a pediment; projection acting as breakwater

ACROTERIO