The building is decagonal in plan, inscribed in a square (measuring 8 x 8.20 m.) and is preserved almost to the height of the vaulted roof. The interior is decorated with niches, four on the north side and two on the south. Over each niche there is a relieving semi-circular arch.
It was part of a large architectural complex, probably an aristocrat's estate, which occupied an area of 2.000 sq.m. on the western side of the Preveza peninsula. It is located at a distance of 500 m. from the natural harbour of Artolithia. The whole complex is dated to the 3rd century B.C.
In 1993, the local Ephorate conducted a restricted rescue excavation on the site.