The "Basilica" of San Frediano is one of the oldest places of worship in Lucca: according to tradition, Saint Fridianus, bishop of the city from 560 to 588, founded the church, and it was mentioned for the first time in a document from the year 685 as a Lombard-era basilica.
The church is famous for the large mosaic on its façade, dating to the end of the 13th century and an extremely rare ornamentation in the Romanesque style: in Tuscany, the only other façade decorated like this is on the Church of San Miniato al Monte in Florence.
The mosaic depicts Christ the Redeemer ascending to heaven, in a mandorla held by two angels. The figure of the Virgin is missing between the Apostles, which was removed when the modern window was installed. The artwork is in the Byzantine style and is attributed to the Lucca-based school of Berlinghieri.