The Holy Emperor Constantine, who received from the Church the name of the Equal-to-the-Apostles, and in world history was called the Great, was the son of Caesar Constantius Chlorus, who ruled the countries of Gaul and Britain.
The huge Roman Empire was at that time divided into Western and Eastern, headed by two independent emperors who had co-rulers, one of whom in the Western half was the father of Emperor Constantine.
Holy Empress Helena, mother of Emperor Constantine, was a Christian. The future ruler of the entire Roman Empire - Constantine - was brought up in respect for the Christian religion. His father did not persecute Christians in the countries he ruled, while in the rest of the Roman Empire Christians were subjected to severe persecution by the emperors Diocletian (284-305) and his co-ruler Maximian Galerius (305-311) in the East and Emperor Maximian Hercules (284-305) - in the West.