Saint Demetrios was born in Thesaloniki, Greece in 270 AD. He came from a wealthy family and because he was athletic in appearance and heroic in spirit, he became a high-ranking officer in the Roman Army at a very young age. (This is why he is depicted in Byzantine icons in military dress, either standing or riding a horse.) He considered himself a soldier of Christ first, and a military soldier second. He spent most of his time as a devout missionary, preaching the Gospel at secret meetings and converting pagans to the Christian faith.