Related Clues:

• Top of a rotunda, often
• Work with engineer in cupola
• Rounded ceiling
• Taj Mahal distinctive feature
• Temple topper, at times
• Topper of some stadiums
• Do a turn, roaming circular building
• Hemispherical structure
• Top of many a statehouse
• The Pantheon in Rome has one
• Barrel kept in bar, a domed building
• Head seen in random encounter
• Top of a mosque
• Do a turn (anag) — circular domed building
• One may be geodesic