What is the purpose of a "cornice" in architectural design?

A cornice serves a vital role in architectural design by crowning a building and providing a visual transition between the roof and the walls. This ornamental element often projects from the top of a structure and can be elaborately designed, making it both functional and decorative.

The cornice helps to articulate the upper boundary of the building, creating a clear distinction between the structure and the sky. It often enhances the overall aesthetic appeal of a building, drawing the eye upward and emphasizing its height. Additionally, the cornice can also assist in directing water away from the walls, which helps with the longevity of the materials used in construction.

Other options emphasize different aspects of architectural features but do not reflect the primary function of a cornice in the same way. For instance, supporting the foundation relates more to structural components rather than decorative elements like a cornice. Enhancing sunlight exposure and creating contrast with the roof pertain to different design considerations that do not define the cornice’s primary purpose.