The Portuguese Roman Catholic Diocese of Porto (Latin: Dioecesis Portugallensis) (Oporto) is a suffragan of the archdiocese of Braga. Its see at Porto is in the Norte region, and the second largest city in Portugal. The diocese was probably founded in the middle of the sixth century. At the third Council of Toledo (589) the Arian bishop Argiovittus, though he condemned the Arian belief and accepted the Catholic belief, was deposed in favour of bishop Constantinus. In 610 Bishop Argebertus assisted at the Council of Toledo, summoned by King Gundemar to sanction the metropolitan claims of Toledo. Bishop Ansiulfus was present at the Sixth Council of Toledo (638), and Bishop Flavius at the Tenth (656). More information...
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