The vaulted-ceiling roof is painted with the "Triumph of Our Lady of the Conception" (), and includes molded and framed elements, as well as the signette of the Virgin Mary. This figurative and symbolic ceiling, in blue, gold and ocre, depicts figures of an angel with lance killing a dragon over a globe. The Virgin is located over a lunar crescent, crowned by stars, being blessed by God, with clouds and the heads of angels filling in the rest. The main scene is framed by architectural motifs, heads of angels selectively placed in the cardinal directions, and arches forming an architectural frieze.