More than 1,500 years after its collapse in A.D. 476, the Roman Empire has seen a resurgence in the unlikeliest of settings — social media. Online users, predominantly on the video-sharing app ...

A group of Roman re-enactors. The Roman army was the largest fighting force in the ancient world. It conquered a huge empire that stretched ... Image caption, This modern painting shows Roman ...

Historians record that the unified Roman Empire was ruled by 69 emperors between the first emperor Augustus (who reigned from 27 B.C. to A.D. 14) and Theodosius (ruled from A.D. 379 to 395), but ...