 In this period began the process that ended in the rupture between Roman art and that of Late Antiquity, the watershed between classical art and that of Byzantium and the Middle Ages.Some of Severan art's products saw the emergence of obvious elements from plebeian art and provincial art, whilst in other areas traditionally Hellenistic elements were kept alive longer, such as in portraiture, which flourished in this period with masterpieces of great psychological depth.The most important works in Severian art were the Arch of Septimus Severus in the Roman Forum (erected for the Parthian triumph of 203); the Forum, the basilica and the Arch of Leptis Magna, the birthplace of the emperor (completed by 216); and the Arcus Argentariorum in Rome, erected in honor of the emperor by the bankers of the Forum Boarium in 204.