Which of the following is a defining trait of Roman architecture?

• A. Arches, vaults, and domes
• B. Doric columns
• C. Rectangular temple plans
• D. Large stained-glass windows

Answer: (A)

Arches, vaults, and domes define Roman architecture. The arch redirects weight away from a supported plane and outward to columns or walls, enabling wider openings and larger, more open interiors. Vaults—barrel and groin—extend those spaces in length or breadth, creating expansive covered halls like basilicas and aqueduct courts. Domes crown spaces and, with Roman concrete, allow massive, uninterrupted interior volumes—as seen in the Pantheon. This combination of structural innovations is what distinguishes Roman architecture from earlier Greek practice, which relied on post-and-lintel forms and column orders, and from later Gothic design, which is noted for features like large stained-glass windows rather than the Roman emphasis on arches and vaulting.