It is dedicated to St. Paragorius, a saint who fled with his companions from Libia, to escape from persecution under Diocletian (end of the 3rd century), took refuge in Corsica, in the town of Calenzana, and there was martyred.

The white and black coloring of the portal (from 13th century) matches the gothic protruding porch, made of stone and bricks, supported by two columns.

Remains of a Paleochristan baptistery and late antique necropolis were found in the archaeological excavations carried out in the 1970's by Nino Lamboglia in the area around the church.

Later excavations under the Ligurian Archaeological Superintendence showed also remains of a settlement of craftsmen and of the early church edifices (6th century).

Also on the right, closer to the presbytery, is exposed a beautifully painted wooden crucifix, called "Volto Santo" (Holy Visage), with a 12th Century sculpture of oriental origin of martyred Jesus in characteristic long surplice (colobium).

Under the pulpit is exposed a round tomb stone, made from slate and marble (decoration style unique to Liguria), that remembers Domino Verdane (nobleman from Noli, 1296).

On the walls of the side naves are visible 15th–16th-century paintings, among them one by Teramo Piaggio, representing St. Paragorius on a horse with his three brothers in faith, Parteo, Partenopeo and Severino, with the Virgin and the Child.