Monopteral

Monopteral - A term applied to a building with a single row of columns on all sides.
Monopteral circular temple
Mosaic Ravenna ...

the Greek words for "circle" and "column") is a term used in architecture. A structure composed of a circular range of columns without a core is cyclostylar; with a core the range would be peristyle. This is the species of edifice called "monopteral" ...

a circle, and 6TUXos, a column), a term used in architecture. A structure composed of a circular range of columns without a core is cyclostylar; with a core the range would be peristyle. This is the species of edifice called by Vitruvius monopteral.