10. from Langon to Messac

Romanesque church built at the beginning of the 10th century by the monks of St Sauveur de Redon and enlarged in the following centuries.
Its bell tower with its twelve bells symbolizes the twelve apostles around the Eternal Father.
In the North apsidiole, 13th and 14th century mural painting.
It is dedicated to St Peter and Paul and partially listed as a Historic Monument.
It has just been totally restored.

In antiquity, Gallo-Roman thermal baths with apse in cul de four including a painted decoration of the 2nd century discovered in 1839 and representing "Venus at the toilet", then transformed into a church in the 6th century dedicated to St Vernier then into a funeral chapel, the chapel Ste Agathe is classified as a historical monument.

Viaduct of the railway line between Rennes and Redon built between 1858 and 1861 in ashlar. It is 139m long and 30m high. Its oblique arches to resist the current make it a remarkable work of art. Two of its pillars shelter bats.

The chapel was built in 1644 by Jean Le Marchand, Sieur de Tréguily, following a vow made to Notre Dame for having protected its salt stocks during the floods of the Vilaine.