Inside, two vaults and Corinthian pilasters along the walls. On the triumphal arch, you can see two angels representing prestigious stucco, and in the center, a painting of the patron saint. On the cross vault of the chancel is an Apotheosis of St. Charles Borromeo, surrounded by stucco decorations.
The statue of the Virgin on the marble altar dating from the eighteenth century. The altar framed with stucco angels has a beautiful painting, which can be attributed to G. A. Pettrini and represents the Handover to St. Peter (1730).
In a side chapel is a paiting of the "Pietà" (seventeenth century).
The facade of the church was restored in 2001. Inside is also a Via Crucis in bronze of sculptor Nag Arnoldi.