Mar Shimun Bar Sabbae was the Bishop of Seleucia-Ctesiphon from Persia, the de facto head of the Church of the East, maintaining this position until his death. He was bishop in the Sasanian Empire during the persecutions of Shapur II against Christians and he was executed along with many of his followers. He is revered as a saint in various Christian communions.

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Good Friday, 345

canonized

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