Pediments are a form of gable in classical architecture, usually of a triangular shape. Pediments are placed above the horizontal structure of the cornice, or entablature if supported by columns. In a
Types of pediment; "curved" and "broken" examples at the lower right
Neoclassical pediment of the Madeleine Church, Paris, with sculpture (1826–1834) by Philippe Joseph Henri Lemaire
Open pediments on windows at the Palazzo Farnese, Rome, by Antonio da Sangallo the Younger, begun 1534
Open pediment in a fresco from Boscoreale, 43-30 BC
An entablature is the superstructure of moldings and bands which lies horizontally above columns, resting on their capitals. Entablatures are major elements of classical architecture, and are commonly
Pediment
…classical architecture, usually of a triangular shape. Pediments are placed above the horizontal structure of the cornice (an elaborated lintel), or entablature if supported by columns. In ancient architecture, a wide and low triangular pediment (the side angles 12.5° to 16°) typically formed the top element…
Entablatures at Caesarea Maritima
Entablature at the Temple of Venus Genetrix, Rome
Entablature of the Doric order
Entablature of the Ionic order