Tambour (architecture)
In architecture, "tambour" has three meanings.
In classical architecture, a is the inverted bell of the Corinthian capital around which are carved acanthus leaves for decoration.
The term also applies to the wall of a circular structure, whether on the ground or raised aloft on pendentives and carrying a dome.
Finally, "tambour" can refer to the drum-shaped segments of a column, which is built up in several courses.