Cathedra Notre-Dame et Saint-Thyrse

The Wars of Religion affected the monument, whose bell tower has been rebuilt and portal has been restored. The latter features mediaeval chapiters. The stain glass of the large rose windows dates from the 19th century.

The nave is particularly vast, with a perched lancet-arch vault that is over sixteen metres high. The decoration on the chapiters is highly diverse. Building work on the side chapels began in the 16th century. Numerous protected paintings can be found here.

The barrel vault of the choir is formed by alternate layers of black and white stone, a typical feature of Lombardic work.
The eighteen stalls in carved walnut date from the 17th century, as does the retable in golden wood that surmounts the high alter. An Episcopal see to the right of the high alter and a carved panel depicting Saint Francis of Sales and Saint Barbara can be seen here.