Four excavation campaigns have been undertaken on the castle of Rontana between 2007 and 2010. The investigations concentrated on four main areas, situated in strategic positions for the comprehension and analysis of the site: the summit area (sector 1000), the “lower court” (sector 2000), the residential area (sector 3000) and the defences on the southern side of the fortification (sector 5000).

Numerous burials relating to the castle’s first occupation phase (10th century) were found in the area of a large masonry-built structure, still largely to be excavated, on the summit plateau close to the ogival tower, which today still distinguishes the castle.
On the southern side, where a sheer drop overlooks the Lamone valley, an imposing quadrangular tower came to light. Built of stone blocks, plastered both on the interior and exterior, it was reinforced in the second half of the 13th century by an oblique buttress which surrounds the structure’s entire perimeter. The first floor of the tower is preserved with an entrance on the north side at a height of about 3 m above ground level. To the exterior is a large open space paved with mortar separating it from the castle’s curtain wall, preserved here to a height of about one metre.
Furthermore, a bread oven was identified, built abutting the Rocca, in the area defended by two buttressed walls and isolated from the rest of the settlement.

In the east quarter a dwelling with a courtyard was identified, datable to the 13th century, with an earlier stratigraphy probably dating to the first occupation phases of the castrum.