HEGESIPPUS (ft. A.D. 50-180), early Christian writer, was of Palestinian origin, and lived under the Emperors Antoninius Pius, Marcus Aurelius and Commodus. He belonged to that group of Judaistic Christians which, while keeping the law them selves, did not attempt to impose on others the requirements of circumcision and Sabbath observance. He was the author of a treatise (inroµvi saTa) in five books dealing with various aspects of the Christian Religion, fragments of which are found in Eu sebius. Hegesippus was also great traveller, and like many other leaders of his time came to Rome about the middle of the 2nd cen tury. His journeyings impressed him with the idea that the con tinuity of the church in the cities he visited was a guarantee of its fidelity to apostolic orthodoxy : "in each succession and in every city, the doctrine is in accordance with that which the Law and the Prophets and the Lord (i.e., the Old Testament and the evangelical tradition) proclaim." To illustrate this opinion he drew up a list of the Roman bishops.