Colossal head of Emperor Constantine. The head, dating from 330 AD, measuring 2.60 meters (8.53 feet). It is what remains of a statue that had to reach a total height of 12 meters (39.37 feet), once placed in front of the Basilica of Maxentius. Today it's exposed at Palazzo Conservatori in Rome
The Tetrarchs, AD 305. Porphyry. This portrait of the tetrarchs was probably originally part of the palace in Constantinople, but is now built into the corner of St. Mark's Basilica in Venice. The style here reflects a new emphasis on the position of Emperor, rather than the person holding this office through "similitudo": a generic face that is not particularly accurate to the individual, but emphasizes the similarity among the four tetrarchs.
Bronze Portrait of a Man Identified as Marcus Agrippa. It was discovered in 1904, near the Arch of Augustus in Susa, a town in northern Italy not far from Turin. The identification of the head as that of Marcus Agrippa appears to be confirmed by an inscribed stone base that was also discovered. Agrippa was one of Augustus’ closest friends and supporters, who played a role in the civil wars during the 30s BCE.