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In Classical and Neoclassical architecture, a building or room that is circular in plan and covered with a dome. The Pantheon is a Classical Roman rotunda. The Villa Rotonda at Vicenza, designed by Andrea Palladio, is an Italian Renaissance example. The central hall of the U.S. Capitol is an example of the rotunda in its familiar role as part of a monumental public building.
This entry comes from Encyclopædia Britannica Concise. For the full entry on rotunda, visit Britannica.com.