Understanding Epistyles in Architecture: A Guide to Their Function and Design

In architecture, an epistyle or epistylium (plural: epistyles or epistylia) is a molded frame that runs along the top of a building's walls, above the cornice or other ornamental moldings. It serves as a support for the roof and provides a finished look to the exterior of the building.

The epistyle can be made of various materials such as stone, brick, or wood, and it may be decorated with carvings, modillions, or other ornaments. In some cases, the epistyle may also serve as a balustrade or parapet, providing a safety barrier along the roofline.

The term "epistyle" is derived from the Greek word "epistylon," meaning "a layer or course of tiles." It was commonly used in ancient Greek and Roman architecture to describe the molded frame that supported the tiles or slates on the roof. Today, the term is still used in architectural design and historical preservation to refer to this distinctive feature of classical and traditional buildings.