He studied Latin literature, philosophy, and Greek. He spent time in the culturally diverse environment of Nicomedia (the eastern, oldest capital of the Roman Empire, now a city in Turkey), where he met both pagan and Christian intellectuals. He may have attended the lectures of Lactantius, a Christian Latin scholar. Diocletian did not fully trust Constantine, who was treated as a hostage at his court. This made Constantine obedient to Diocletian.