Roman Empire

The Roman Empire was a large, dictatorial state that existed in Europe for about four centuries, starting a few decades before the birth of Jesus Christ. It was centered in the city of Rome, though it encompassed cities like Pompeii and Byzantium and had a presence as far as Cardiff, where a Roman fort was situated.

One of Scaroth's temporal splinters is known to have posed as a high-ranking Roman, possibly even an emperor. (DW: City of Death)

The Doctor visited southern Europe many times during the Roman period. He was alleged to have met, among other humans native to this time, Hannibal (DW: Robot) and Cleopatra. (DW: The Masque of Mandragora, The Girl in the Fireplace) He was also familiar with the accounts of Julius Caesar and Tacitus on the customs of the Celts and their Druid priests, noting them as among the few historically reliable ones, but with no great detail. (DW: The Stones of Blood) He has also visited Judea during the reign of Augustus, and beat Mary and Joseph to the last room in a local inn. (DW: Voyage of the Damned)

A group of Roman soldiers was kidnapped by the War Lords for use in their war games. (DW: The War Games)

By the year 12005, a New Roman Empire flourished. (DW: The End of the World)

Stories Set During the Time of the Roman Empire

 * MA: State of Change (43 B.C., 10 B.C.)
 * PDA: Byzantium! (A.D. 64)
 * ST: Romans Cutaway (A.D. 64)
 * DW: The Romans (A.D. 64)
 * ST: The Last Days (A.D. 73)
 * BFA: The Fires of Vulcan (A.D. 79)
 * DW: The Fires of Pompeii (A.D. 79)
 * DW: The Pandorica Opens/The Big Bang (A.D. 102)
 * BFA: The Council of Nicaea (A.D. 325)

Apocryphal References
In the native timeline of the human scientist Dr. Who, he inadvertently landed his TARDIS in the midst of a marching legion of Roman soldiers after leaving Skaro. (Dr. Who and the Daleks)