Sources: Talmud Bavli Sanhedrin 5a (patriarchal authority); Origen, Letter to Africanus; Epiphanius, Panarion 30; Codex Theodosianus 16.8 (Roman law on the Patriarch).

The Patriarchate (Nasi — Prince) was the office of the head of Palestinian Jewry, based in Tiberias and recognized by both the Jewish community and the Roman imperial government. Beginning with Rabban Gamliel I (Acts 5:34 — Gamaliel) and reaching its peak under Rabbi Judah HaNasi (the editor of the Mishnah, ~135–220 AD), the Patriarchate wielded enormous authority: collecting taxes from diaspora communities (the “apostolic tax”), appointing judges, and serving as the recognized political representative of world Jewry before Rome. The Patriarchs claimed descent from Hillel (and through him from David), giving them both scholarly and royal legitimacy. Origen (~240 AD) describes the Patriarch as having quasi-royal power — trying capital cases, punishing by lashes and imprisonment. Roman emperors from Constantine onward had complex relationships with the Patriarchate — sometimes granting privileges, sometimes restricting them. Emperor Theodosius II formally abolished the office ~425 AD after the last Patriarch (Gamliel VI) died without an heir, transferring the collection tax to the imperial treasury. The Patriarchate’s end marks the effective end of centralized Jewish political authority in Palestine and the shift of Jewish intellectual leadership to Babylon.