The Saint Peter's Cathedral is one of Brittany's nine historical cathedrals. Its neoclassical style construction was finished in 1845. The façade has two towers made of granite, each one composed of four levels, which are reinforced with columns. The chapels located in the transepts are ornamented with sumptuous frescoes, one is dedicated to Saint Anne and the other one to Mary. The vault of the nave is decorated with golds and the columns had been covered with white stucco in order to attenuate its austere aspect.