Emperor Wu: Did you mean...?

A statue of the Roman Emperor "Constantine the Great" who reigned from approximately 306 to 337 CE.

Portrait of Leopold II, Holy Roman Emperor (l. 1747-92), wearing a field marshal's uniform. Painted in the workshop of Jean-Marc Nattier, c. 1790.

An 18th century CE engraving by Jacques Gabriel Huquier illustrating an audience with a Chinese emperor. (The Metropolitan Museum of Art, New York)

A Roman coin depicting emperor Tetricus (r. 270-273 CE).

Artist's impression of Emperor Aurelian (r. 270-275 CE) in battle with Sasanid archers, as depicted in the PC game Rome II: Total War - Empire Divided.

Roman sestertius, minted in Rome, 37-38 CE, under Roman emperor Caligula (r. 37-41 CE). Classical Numismatic Group, Inc. http://www.cngcoins.com

This marble head of the Roman Emperor Arcadius (reigned 395-408 CE) came from the foundation trench excavation of the Faculty of Letters-Beyazit, Istanbul, in modern-day Turkey. Late 4th century CE. The head was crowned with a double-string...

Queen Zenobia before Emperor Aurelianus. Giovanni Battista Tiepolo (1696–1770). Oil on canvas. Prado Museum.

Gold coin of Holy Roman Emperor Frederick II, minted in Sicily between 1211-1250 CE. Weighs 5.2 grammes and measures 20 mm (British Museum, London)

Head from a colossal statue (twice life-size) of the Roman Emperor Claudius (ca. 50 CE) that stood in the forum of Carsulae (Umbria, Italy). Only the head and a knee of the statue survive.