The arches of the main aisle are simple rounded arches. These arches are echoed in the arches of the gallery which are half of the main arches' height with central supporting piers. Narrower versions of these arches are also found in the apse. The aisle around the apse is separated from the sanctuary by pillars and by the chapels which open up off of the transept.[6] There are three radiating chapels off of the apse [7] and two chapels off of the transept.[8] The side aisles are roofed with a barrel vault that was originally covered with stucco.[6] The nave at Conques is roofed with a continuous barrel vault which is 60 cm thick. The nave is divided into bays by piers which rise through the gallery and over the barrel vault. The piers of the naves are huge stone blocks laid horizontally and covered with either four half-columns or four pilasters. The interior of the church is 20.70 meters tall with the sense of verticality being intensified by the repeating pattern of half-columns and pilasters approaching the high altar. The barrel vault's outward thrust is met by the half barrels of the galleries which run the length of the nave and transept