Relationship: Severus of
Antioch had ecclesiastical authority over Mark.
Sources:
Ernest Walter Brooks,The Sixth Book of the Select Letters of Severus, Patriarch of Antioch, in the Syriac
Version of Athanasius of Nisibis. Translation, Part I: Letters I.1-II.3, vol. 2.1 (London: Williams and Norgate, 1903), part: 1.29, p: 91-92.