of Art, New York, ; full text available online from The Metropolitan Museum of Art Libraries External links Constantina – De Imperatoribus Romanis Santa Costanza – Santa Costanza Photo Gallery High-resolution 360° Panoramas and Images of Santa Costanza | Art Atlas 4th-century churches Costanza Mausoleums in Rome Early Christian art Palaeo-Christian architecture in Italy Rome Q. XVII Trieste Round churches