11th-century nave, 12th-century bell tower (1120-1140).
The nave and the lower part of the porch tower date from the end of the 11th century. The central nave opens onto the aisles through a series of large semicircular arches, the spandrels of which are in fine ashlar. These arcades rest on the cubic capitals of columns whose shafts are alternately round and polygonal. The spandrel between the third and fourth south bays is decorated with a Romanesque fresco depicting the Tree of Jesse. From the branches of this Tree of Life grow men and women who represent the ascendants of Christ himself, depicted enthroned in the crown of the tree next to a vacant seat.