 Also high up on the north wall of the transept is the stained glass window entitled "Vingt-Huit Saints Armoricains, Lėonards et Cornouaillais" (Bay 117)

On the lower level of the north side of the choir are four chapels; La chapelle de Saint-Pierre, the Chapelle de Saint-Frédéric, the Chapelle de Saint-Roch and the Chapelle de Saint-Corentin

After crossing the transept, we arrive at the Chapelle de Saint-Pierre.The chapel walls evoke "la collation des pouvoirs de lier et délier à saint Pierre".The stained glass window of 1856 by Lobin of Tours recalls the restoration of the cathedral's spires at the time of Monseigneur Joseph Marie Graveran.