The vestry floor rested on the bedrock. There were no finds but it was ascertained that the apse had been added, linking the crypt to the monastery.
Below the crypt floor, raised in the apse by 20 cm, the base of an altar was found in the centre of the presbytery. This rested on a thin concrete floor forming a single level, which covered the threshold of a door made in the apse during the church’s “civil” use and blocked up in around 1930 when cult use resumed.
Below the concrete was a mortar makeup showing traces of terracotta floor tiles, three rubble filled trenches and, in the apse, more rubble which when removed revealed a rough opus signinum floor.

In the western part of the crypt traces of steps leading to the upper church were found.
Near a pilaster in the apse a “casetta” made of tile segments was found. As it was empy no certain interpretation was possible: the hypothesis being that it was a hiding place for reliquaries.

Excavation of the trenches produced fragments of decorative architectural elements and reached down to the bedrock. It was also ascertained that the stone columns, at present in their natural state, were plastered in antiquity.
The patches of opus signinum floor in the apse were removed revealing a makeup of stones overlying mortar cast directly on the bedrock.
The base of the apse wall had an offset on which the pilasters rested. The stone pilasters were originally semicircular and faced with plaster. They were demolished down to the level of the cement, as was the exterior apse wall, and subsequently rebuilt in rectangular form and in a staggered position with respect to the originals.
It is suggested that these remains, pre-existing the 12th century church, belonged to an independent structure that was demolished and subsequently used as the foundations for the enlargement of the church.