Conversion and Episcopate
Church tradition holds that Hierotheus was one of the learned men of the city of Athens who received Christian instruction from the Apostle Paul. Paul baptized and ordained him around the year 52–53. Some accounts describe his conversion as occurring together with that of Saint Dionysius the Areopagite.
He is widely identified as the first Bishop of Athens. A catalogue attributed to the Archbishop of Athens lists Hierotheus as the first Bishop of Athens (A.D. 52), followed by Dionysius as the second. The tradition is not uniform, however: there is disagreement as to whether Hierotheus held the rank of priest or of bishop, and some traditions instead credit Dionysius the Areopagite as the first bishop of the city.
Hierotheus is remembered as a spiritual mentor to Saint Dionysius the Areopagite, whom he frequently visited and instructed, and whom—by one account—he initiated into the mysteries of Christ more thoroughly than others did. He is said to have died a martyr's death later in the first century, and is accordingly classified as a hieromartyr.