Domes and vaults are architectural elements that provide covered interior spaces. Domes are rounded vaults that can be made from curved masonry segments or a shell of revolution. Vaults are ceilings constructed from materials like brick, stone or concrete arranged in an arched manner. Common types of domes include hemispherical domes, geodesic domes, and onion domes. Elements of domes include features like coffering, pendentives, and lanterns. Vaults have been used since ancient times by civilizations like the Romans and Egyptians and include styles like barrel vaults and groin vaults.