On a plateau overlooking the valley of the Creuse, Ahun Acitodunum is the former Gallo-Roman. The medieval city will extend a little higher and be surrounded by walls, still partly visible. Ahun castellanies is one of seven of the Haute-Marche.
The crypt, first church of Ahun was certainly in the Gallo-Roman pagan temple whose columns have been reused.
Near the altar, a reliquary shrine housed the medieval remains of the local Saint, Silvanus.
The Romanesque church will be built in the 13th century, above the crypt. The facade is classical, the nave was rebuilt in the eighteenth complement. The interior has been restored to the same. The Pietà (Chapel left when entering) the 16th is certainly one of the wonders of this building. The choir is home to baroque carvings typical of seventeenth.
Stone garden: evocation of Jacques Lagrange and presentation of numerous remains of Ahun.