Wörterbuch (en): Tambour
de: 
Tambour (m) (Kuppelunterbau)
fr: 
Tambour (m) / Trommel (f) 
it: 
Tamburo (m) 
es: 
Tambor (m) 
A vertical architectural element with a mostly round, and sometimes also polygonal or oval cross-section, which acts as a connecting element between a mostly square structure and a dome or monastery vault roof.

