Some key features of Roman vaults include:
1. Use of concrete: The Romans were skilled in using concrete for construction purposes. They used a mixture of volcanic ash, lime, sand, and water in the construction of their vaults.
2. Arches: Roman vaults used arches to support the weight of the structure. They were able to create larger and more complex vaults by using multiple arches.
3. Barrel vaults: Barrel vaults were a common form of Roman vaults. They were created by constructing two parallel walls with an arch connecting them. Multiple barrel vaults could be constructed side by side to create larger structures.
4. Groin vaults: Groin vaults were another form of Roman vaults. These were created by intersecting two barrel vaults at right angles, forming a series of groins or ridges along the ceiling.
5. Use of decorative elements: Roman vaults were often embellished with decorative elements, such as frescoes, stucco work, or mosaic tiles, to create a visually stunning effect.
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