domes (architectural elements) <p style="font-weight: 400;">Rounded vaults comprising spheres or portions of spheres sitting on circular, elliptical, or polygonal bases, forming the roof of any building or part of a building. They are constructed so that they exert equal thrust in all directions.</p> <p style="font-weight: 400;">Source: Art and Architect Thesaurus</p> <p style="font-weight: 400;"><a href="http://vocab.getty.edu/page/aat/300001280">http://vocab.getty.edu/page/aat/300001280</a></p>