 The short transept consists of two rectangular-shaped chapels opened in the Baroque age, dedicated of the Madonna del Rosario on the left and to the Crucifix on the right.The presbytery and the choir is flanked by two small naves in which recent restorations have led to the discovery of interesting paintings from 14th and 16th centuries.Dated around 1450, this chapel is supposed to have become, about the 17th century, an oratory instituted by the noble priest Giovanni Battista Caccia (whose remains are buried in a crypt in front of the chapel of the Crucifix in the Chiesa di San Lorenzo).