From Italian for "round", it's a large & high circular hall in a building, usually surmounted by a dome
[DOC] [TLE] Domestic Architecture 1700 to 1960 - Faculty of Environment and ... [PAR] So the typical Georgian town house was tall and narrow with a long narrow 
garden or ... For the paving of the halls of large houses, Purbeck stone was often 
.... Doorways continued to be surmounted by fan lights: semi-circular designs 
were ... Greek Revival architecture found its best expression in large public 
buildings but... [DOC] [TLE] Glossary - Catena: Digital Archive