A dome-shaped architectural structure that is the chief or principal dome, or a dome representing a primitive architectural style.
From Greek 'archi-' (chief, principal) combined with English 'dome' (curved roof). This architectural term distinguishes the main domed structure from secondary ones.
Great architectural domes like the Pantheon aren't just pretty—their mathematical curves distribute weight so efficiently that some ancient domes are still standing after 2,000 years without needing modern repairs.
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