 The church, without an apse and a transept, maintained its original single-nave plan until at least 1627. In 1662 the naves had become three, separated by two rows of square brick pillars and surmounted by vaults. The church had five altars in 1627, increasing to six in 1649. In 1726 the closing of its side gate along the Borgo Vecchio made room for another altar.
