Flavius Valerius Constantinus, as he was originally named, was born in the city of Naissus (today Niš, Serbia), part of the Dardania province of Moesia on 27 February, probably c. AD 272. His father was Flavius Constantius, who was born in Dacia Ripensis, and a native of the province of Moesia. Diocletian divided the Empire again in AD 293, appointing two caesars (junior emperors) to rule over further subdivisions of East and West. Each would be subordinate to their respective augustus (senior emperor) but would act with supreme authority in his assigned lands. This system would later be called the Tetrarchy. Constantine went to the court of Diocletian, where he lived as his father's heir presumptive. Constantine received a formal education at Diocletian's court, where he learned Latin literature, Greek, and philosophy.