Access to the sacristy covered by wooden coffered ceiling, with finials in the center. East wall with straight lintel portal, flanked by framed pilasters and topped by straight cornice. South wall with large lavatory, composed of a straight lintel niche, with a scowl spout at the bottom, flanked by cherubs, framed by Corinthian columns, superimposed on pilasters of the same order, which support entablature topped by a straight cornice. Rectangular tank.