The roof ornament used to conceal the joints of flat tiles is which term?

• A. Antefix
• B. Pteroma
• C. Anthemion
• D. Acroterion

Answer: (A)

The key idea here is identifying a roof element whose specific job is to hide the joints where flat tiles meet. That function describes antefix, which are vertical blocks or plaques placed along the ends of a roof tile course. They not only conceal the joints and nail heads but also protect the underlying joints from water and provide a finished, decorative edge along the eaves or roof line, a common feature in ancient Greek and Roman roofs and later revivals. The other terms refer to different kinds of ornament or placements: anthemion is a floral decorative motif used on friezes and other surfaces, acroterion are ornaments placed on the apex or corners of pediments, and pteroma involves a different architectural concept not related to covering tile joints.