Excavations took place at the Gioiella-Vaiano Villa site in the Comune of Castiglione del Lago from 1 June to 5 July 2017. The site, which is situated on a hill overlooking Lago di Chiusi, comprises a large villa complex spread out over at least three terraces. The 2017 campaign focused on two areas: the central terrace where a series of features of various date were uncovered, and part of a bath complex on a lower level to the south-east.

In the central area, two adjoining excavation squares revealed two substantial north-south walls approximately 1.5 meters apart. These walls supported a staircase that likely connected the central area to a lower terrace. Large well-cut stones are keyed into the walls forming a series of supports along each side of the staircase; the steps themselves were likely made of wood. At the end of the 2017 campaign, an approximately 3-meter length of the staircase has been uncovered reaching a depth of 1.5 meters on the south. The bottom of the staricase is not yet visible. To the east of the staircase, there is a well-built cobble wall that forms an apse facing north; only a small fraction of the apse was excavated in 2017, and the function of this structure remains unknown. After the apsidal structure went out of use, a north-south concrete wall was constructed up against and over the apse. This feature runs the length of the 4 × 4 meter square and its overall length and function is not yet certain, however, it may have served as a retaining wall for the terraces. The pottery in the fill in this area is mixed, ranging in date from the 3rd century BC (black-glaze) to the 3rd century AD (sigillata) with a few small sherds of invetriata, suggesting that the fill is late. The most interesting find from the central area was part of a catilus from a Roman mill, confirming large-scale agricultural production at the villa in the Roman period.

Excavation to the south-east, on a lower terrace approximately 3.50 m below the central area, confirmed the location of the bath complex, the presence of which had been supected based on the survey conducted in 2015. After removing the topsoil, which contained mostly building material related to the bath—including tiles, tubuli, suspensurae, and fragments of mosaic—we were able to identify the hypocausts for at least two heated rooms, with a possible third room to the west. The hypocaust walls appear to have been cut directly into the natural sand and lined with cocciopesto. The northern room is apsidal, and there appears to be an opening between the two rooms to allow for the flow of air; however, the location of the stoke hole has not yet been discovered. In both rooms, the lowest levels of the pilae for the hypocaust remain in situ in several places. Fragments of black-and-white mosaic were recovered along with many pieces of tubuli for heating the walls. In the area just to the west of the southern room, several nice examples of window glass were recovered. The bath complex would have had a pleasant southern aspect overlooking the Lago di Chiusi.