The statue of St Helena (1630-39) was carved by Andrea Bolgi (1605-56). It is signed and dated on the neck of her garment: ANDREAS BOLGIVS CARRARIENSIS F 1639 (Andrea Bolgi from Carrara made it in 1639).
St Helena was the mother of Constantine the Great (r. 306-337), the first Roman emperor to convert to Christianity. Helena converted before her son and went on to build churches in Rome and beyond. Legend has it that on a pilgrimage to the Holy Land, St Helena discovered the True Cross of Christ.