Tambour (architecture)
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In architecture, tambour has three meanings.
In classical architecture, a tambour(Frenchfor'drum') is the inverted bell of the Corinthian capital, around which acanthus leaves are carved for decoration.

The term also applies to the circular or polygonal wall of a structure that supports a dome, cupola, or lantern, whether on the ground or raised aloft on pendentives; in this sense, it is also called a tholobate.

Finally, tambour can refer to the cylindrical stone blocks, or drums, that make up a column built in several courses.

Notes
- This articleincorporates text from a publication now in thepublic domain:"Tambour". Encyclopædia Britannica. Vol.26 (11thed.). 1911. p.388.
- "Tholobate". Encyclopædia Britannica. Vol.26 (11thed.). 1911. p.862.