 The chapel was built by Bishop Christophe de Penmarc'h.In the chapel, there are also traces of the tomb of Alain de Penmarc'h who was Christophe's nephew and a canon at Saint-Brieuc and the tombstone of canon Rolland de la Fruglaye who died on 1 September 1454.The next chapel is the Chapelle Saint Yves which dates to the 15th-century and was commissioned by Christophe de Penmarc'h and his brother Louis.