Book 6 — Chapter 21 - Overseers Known at the Time
Book VI is dominated by Origen and the intellectual life of Alexandria and Caesarea, then the persecutions under Severus, Maximinus, and Decius, with Dionysius of Alexandria becoming a principal witness. He synchronizes local leadership with imperial reigns, using successions at Rome, Alexandria, Antioch, and Yerushalayim as chronological anchors. These notices are institutional claims from his sources, not proof that every later title or jurisdiction existed in identical form from the beginning. In this reconstruction the chapter coordinate is preserved as Book 6, Chapter 21, and the full subject is retained under the heading 'Overseers Known at the Time'. Names, dates, quoted-source relationships, and political or textual function are kept distinct from Eusebius's own interpretive claims.