A cornice, a word from the Latin coronis,[1]​ is a molding that runs horizontally along the upper part of the facing, both on the external and internal faces.[2]​.

It is frequently located under the eaves of the roof, preventing rainwater from falling directly on the wall or sliding down it, in addition to finishing off the façade of the building.

In classical architecture it is part of the entablature, and is composed of several moldings; Two types are distinguished: webbing (surrounds the building marking the division between the floors), and denticulated (decorated by denticles or supported by modillions). When the pediment "Fronton (architecture)") of the classical temple ends, it consists of a geison and curved moldings, also called cymatium.[1]​.

The cornice, in addition to its practical functions, has historically represented a key piece as architectural decoration. In modern construction, the cornice is made using new methods offered by modern materials using expanded polystyrene molds that are placed as part of the formwork to pour concrete into the assembly.