AD 270-275 Ancient Rome Aurelian Provincial Tetradrachm Ancient Grades VF. Aurelian was a Roman emperor, who reigned during the Crisis of the Third Century, from 270 to 275. As emperor, he won an unprecedented series of military victories which reunited the Roman Empire after it had nearly disintegrated under the pressure of barbarian invasions and internal revolts. Although Domitian, two centuries earlier, was the first emperor who had demanded to be officially hailed as dominus et deus ("master and god"), these titles never occurred in written form on official documents until the reign of Aurelian. His successes were instrumental in ending the crisis, earning him the title Restitutor Orbis ("Restorer of the World").