The Edict of Thessalonica is issued on February 27, 380, by Emperors Theodosius I, Gratian, and Valentinian II, declares Nicene Christianity as the official state religion of the Roman Empire., Mandating all subjects to follow the faith of the bishops of Rome and Alexandria, branding other Christian sects, specifically Arianism, as heretical.
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Snohomish, Skagit and Island County
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