The church was built in a Romanesque-style during 1072-1104 patronized by the Byzantine emperor Michele VII Ducas.

The interior lunette over the main portal depicts the Madonna and child between Saints Magno and Secondina (late 13th century).

[citation needed] The frescoes of the apostles on the apse walls were painted in the 17th century by Borgogna.

While the frescoes in the half-dome apse with was completed in the 19th century by Giovanni and Pietro Gagliardi.

During the episcopate of Pandulf from 1237 until 1256, the walls were covered with frescoes depicting biblical scenes, many now severely damaged.