Bishop of those outside (the church).
ἐπίσκοπος τῶν ἐκτός (episkopos tōn ektos).

Politicians
Constantine the Great
Roman emperor (r. 306-337) and the first Christian on the throne. Legalised Christianity (Edict of Milan, 313), convened Nicaea I (325) and founded Constantinople — yet executed his wife and son in 326.
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Source: エウセビオス『コンスタンティヌスの生涯』4.24 (自称、教会内の司教に対する皇帝自身の役割)Verified