A low-pitched gable forming the top section of the facade of a classical Greek and Roman temple; a triangular recess usually found at both ends of classical temples and treasuries and often filled with sculpture. In the classical temple, the outline of the triangle is formed by horizontal and 'raking' cornices which carry decorative moldings. The vertical 'back wall' (tympanum) is often decorated with painting, relief, or sculpture. Each of the three corners was also faced with a special 'corner-piece' (acroterion). It is located above the entablature.