August 2nd.  St. Eusebius of Vercelli.

Early Christianity was grievously disturbed by the Arian heresy (after its propagator, Arius), which denied the full divinity of Christ.  The heresy, widespread and popular, was opposed principally by St. Athanasius and condemned, with only partial success, by the Council of Nicaea (325).  Eusebius, who was born in Sardinia, and became first bishop of Vercelli, between Turin and Milan, was a scholar and also a roving ambassador for orthodoxy; his journeys took him to Alexandria and Antioch.  But he also fell foul of the Emperor Constantius, himself an Arian, and was exiled to the Near East.  He died in 371, and is venerated as a martyr, though his martyrdom consisted of his sufferings for the faith rather than the actual manner of his death.