The plan of the church is composed of a central nave with aisles according to a frequent plan in Romanesque architecture of Poitou. The interior has the effect of a "church agora" on just one plane. The barrel vault has a slightly flattened silhouette, whereas the aisles are covered with a groined vault. Outside, the aisles were covered with a terrace punt[clarification needed], the roof being reserved for the nave: