André Avellin born in 1521 in the region of Basilicata in southern Italy and died in Naples in 1608, is a Catholic priest of the order of theatatins recognized saint by the Catholic Church. He was beatified by Pope Urban VIII on October 14, 1624 and canonized by Pope Clement XI on March 22, 1712. His body rests in Naples in the Basilica of San Paolo Maggiore. His pastoral activity was intense in the troubled period of the Counter-Reformation. This is how he works with St. Charles Borromeo in Milan and the surrounding area. He also worked hard for the poor during the popular uprisings in Naples, a city where this portrait of the saint in Scagliola was probably made. This technique of stucco to imitate marble became very fashionable in the seventeenth century while it appears as an excellent substitute for costly marble inlays workshops hard of the Medici family.