Tholobate

A tholobate (from Ancient Greek θολοβάτης (tholobátēs) 'dome pedestal'), also called a drum or tambour, is the upright part of a building on which a dome is raised. It is generally in the shape of a cylinder or a polygonal prism. The name derives from the tholos, the Greek term for a round building with a roof and a circular wall. Another architectural meaning of drum is a circular section of a column shaft.

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