Emperor: Did you mean...?

An engraved amethyst ring of Roman Emperor Constantius II, c. 360 CE (British Museum, London)

Marble head of Roman Emperor Constantius Chlorus (r. 305-306 CE) who was the father of Constantine the Great. (Ny Carlsberg Glyptotek, Copenhagen)

A portrait of Roman Emperor Titus (reign: 79 – 81), c. 80 CE. (Ny Carlsberg Glyptotek, Copenhagen)

Marble head of Roman Emperor Lucius Verus, c. 160-170 CE. (Ny Carlsberg Glyptotek, Copenhagen)

A relief slab from the tomb of Tang Dynasty emperor Taizong showing one of his horses. c. 650 CE, Zhaoling, China. (University of Pennsylvania Museum of Archaeology and Anthropology, Philadelphia)

A bust of Roman Emperor Vitellius, 69 CE (Carlsberg Glyptotek, Copenhagen)

Depiction of Holy Roman Emperor Maximilian II (r. 1564-1567 CE) on a medal created by Antonio Abondio, 1575 CE. From the collection of the Metropolitan Museum of Art in New York, United States

Bust of Nero at the Capitoline Museum, Rome.

A portrait bust of Vespasian, from Ostia, 69-79 CE. (Palazzo Massimo alle Terme, Rome)

Head of Gallienus from a colossal statue, found near the Baths of Caracalla, Rome, c. 253-268 CE. (Ny Carlsberg Glyptotek, Copenhagen)