Which is a type of ancient vault formed by the intersection of two barrel vaults?

Which is a type of ancient vault formed by the intersection of two barrel vaults?

• A. Groin vault
• B. Parthenon
• C. Pantheon
• D. Pont du Gard

Answer: (A)

A groin vault is formed by the intersection of two barrel vaults at right angles. This crossing creates groins and a four-sided vault surface that efficiently channels weight down to the supporting piers, reducing outward thrust on the walls and allowing larger interior spaces with thinner walls. Romans used this technique to cover aisles and halls in basilicas, baths, and markets, making spacious structures feasible with solid, efficient geometry. The other options don’t describe a vault created by intersecting barrel vaults: the Pantheon is famous for its dome, the Parthenon is a post-and-lintel temple, and Pont du Gard is an aqueduct composed of arches.

A groin vault is formed by the intersection of two barrel vaults at right angles. This crossing creates groins and a four-sided vault surface that efficiently channels weight down to the supporting piers, reducing outward thrust on the walls and allowing larger interior spaces with thinner walls. Romans used this technique to cover aisles and halls in basilicas, baths, and markets, making spacious structures feasible with solid, efficient geometry. The other options don’t describe a vault created by intersecting barrel vaults: the Pantheon is famous for its dome, the Parthenon is a post-and-lintel temple, and Pont du Gard is an aqueduct composed of arches.