In 806 a Benedictine convent was added to the church; in the late years of the same century and in the early 10th century the church, in dismaying conditions, was rebuilt, but with similar appearance. The octagonal baptistery on the exterior, on the left, was built by architect Paolo Mezzanotte in year 1932, and includes a column-shaped font called "Pietra santa" (the Saint Stone) coming from the ancient church of S. Nazaro in Pietra Santa, which was demolished in year 1889 during the construction of the new Via Dante.