astylar
/əˈstʌɪlə
/adjective Architecture
(Of a classical building) lacking columns or pilasters.She then describes the battle of the styles between Baroque, Palladian, and astylar designs for the great voluntary hospitals in Britain....
- The facade has one unbroken surface - an early example of the astylar treatment.
- These buildings are known as astylar, that is without columns.
Origin
Mid 19th century: from a-1 'without' + Greek stulos 'column' + -ar1.