For 10 points, name this ancient empire first ruled by Caesar Augustus and centered in the capital of Italy.
One leader of this empire was reputed to have been a transsexual who referred to himself as "the Queen of Hierocles." That leader, Elagabalus, ruled during the Severan Dynasty, which succeeded a dynasty that included such rulers as Nerva and Commodus. This empire saw the Year of the Four Emperors in AD 69, and its first ruler consolidated power after his victory at the Battle of Actium over Mark Antony. For 10 points, name this ancient empire first ruled by Caesar Augustus and centered in the capital of Italy.
One leader of this empire was reputed to have been a transsexual who referred to himself as "the Queen of Hierocles."
Roman Empire [do not accept or prompt on “Eastern Roman Empire” or “Western  Roman Empire”]