Mosaic (4th cent.) in the ambulatory with the 'Traditio Legis' (transmission of the law to Saint Peter and Saint Paul; Jesus Christ remet la Loi ?Pierre et Paul).- Santa Costanza (Sainte Constance) is a 4th-century church built around the reign of Constantine I as a mausoleum for his daughters Helena and Constantina (later also known as Constantia or Costanza).The mausoleum is of circular form with an ambulatory surrounding a central dome.Early christian art and architecture.Rome; Italy (2020)