S. Ansano is situated in the territory of Allerona in the province of Terni, 3.2 km south of the town, 16.9 km north-west of Orvieto, 45.1 km south of Chiusi, and 34.9 km north of the lake of Bolsena.
Today, the area is surrounded by vineyards and olive groves among which stand several structures of historical and archaeological importance. Two exedra, built of cement and brick stand on either side of a drove-road, which was perhaps used in antiquity, while the remains of other walls of a certain size are visible about 30 m to the north.

At the beginning of the campaign, attention focused on the area around and inside the ruined chapel dedicated to S. Ansano, whose altar stood in one of the apsidal structures. Its state of preservation, frescoes and re-use in the post-antique period make this apse particular interesting. The structure is typical of a Roman or late antique building, the bricks courses bonded with mortar, alternating with stone courses. This opus mixtum is covered in some parts, by a layer of opus signinum.

The importance of the site is indicated by its vicinity to the via Cassia and Via Traiana Nova and the remains present at a short distance from the investigated structures may have had a function linked to the roads. In fact, in the past a spread of material was documented downhill from the complex examined this season, which was interpreted as a probable mansio.

This season, two separate excavation areas were opened:
Trench A, L-shaped running along the west and north walls of the apse;
Trench B in the nave of the church, covering about half of its extension.

Two inhumation burials, not yet excavated, were identified in the first trench. They are probably of late antique date. The excavation of the trench inside the church showed that its floor had been dismantled. The apse presented brick/tiles in situ covered with traces of opus signinum, suggesting that the structure was originally part of a complex whose function involved the use of water, perhaps a bath building.