Ministry at Terracina
According to the Passio, Caesarius was a deacon from the Roman province of Africa who arrived at Terracina, a harbor town near Rome, after a shipwreck. There he preached the Gospel to the poor residents of the town and openly opposed the local pagan practices.
Julian, a presbyter native to the area, is described as working alongside Caesarius in his ministry. The two are remembered together as a named pair and are commemorated jointly.
The chief object of Caesarius's opposition was an annual ritual held at Terracina in which a young man was sacrificed to Apollo by being thrown from a cliff into the sea. Caesarius denounced this practice, and he was imprisoned for rebuking the worship of the pagan gods.