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Row of columns generally supporting an entablature, used either as an independent feature (e.g., a covered walkway) or as part of a building (e.g., a portico). The earliest colonnades appear in the temple architecture of ancient Greece. In a basilica, colonnades are used to separate the side aisles from the central space. See alsostoa.
This entry comes from Encyclopædia Britannica Concise. For the full entry on colonnade, visit Britannica.com.