089. Saint-Jean-le-Thomas. The church plan. Regularly oriented from west to east, the rectangular building is formed by a long nave and a flat apse choir. The whole building has an external length of 31.2 meters and an external width of 8.1 meters (width of the front). The church gate is opened in the south wall of the nave, with a porch. Built along the nave, the tower rises south. Plan by Marie Lebert.

090. Saint-Jean-le-Thomas. The church front and the tower. The wall of the church front is topped with a small glacis covered with schist plates, behind which rises the gable wall. In the middle of the front, a flat buttress ends with a glacis at the base of the gable wall. The two small Romanesque bays on both sides of the buttress were reopened in 1973, during the restoration of the church choir. The massive tower was rebuilt in 1895. Photo by Alain Dermigny. [Alain-044]

091. Saint-Jean-le-Thomas. The pre-Romanesque choir and its south wall. The choir has similarities with the church Notre-Dame-sous-Terre, present in the innards of Mont Saint-Michel and built by the Benedictines shortly after settling down on the Mont in 966. In both buildings, the bay centerings are made of brick quoins, and walls are made of fairly regular small blocks of granite joined with a thick mortar. Photo by Alain Dermigny. [Alain-045]

092. Saint-Jean-le-Thomas. The pre-Romanesque choir. On the left of the large central bay, a small Romanesque bay is clearly visible, with its centering and abutements in granite. Photo by Claude Rayon [Claude-31]