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Also called Philastrius and Filaster, a Spanish bishop. He took as his primary mission resisting the spread of the Arian heresy, once enduring a vicious scourging at their hands. Appointed bishop of Brescia, Italy, he continued to oppose the Arians. He authored the work Catalogue of Heresies, an accounting of twenty eight Jewish and one hundred twenty eight Christian heresies, which was a popular book in the Western Church and was used by St. Augustine. He was much praised by his successor, St. Gaudentius.
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