Aeque principaliter

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Aeque principaliter ("equally important") is a Latin term used by the Roman Catholic Church to indicate a merger of two or more dioceses in which – to avoid questions of predominance – the dioceses are all given equal importance. Such a merger often followed a merger in persona episcopi.^{[citation needed]}

This type of union essentially consists into the fusion of two or more circumscriptions into only one. As a consequence, this new diocese will have two or more episcopal sees and cathedrals, which correspond to those of the previous dioceses.^{[citation needed]}

To give an example, the Roman Catholic Archdiocese of Pamplona and Tudela is a single diocese established by the union aeque principaliter of the Archdiocese of Pamplona and the Diocese of Tudela. Through this fusion, the new circumscription has two episcopal sees: Pamplona and Tudela. As a consequence it has also two (co-)cathedrals, one for each episcopal see.^{[citation needed]}

Parishes may also be merged aeque principaliter.^[1]

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• Diocese of Atri merged aeque principaliter with the Diocese of Penne (from 15 March 1252 to 1 July 1949)
• Diocese of Prato united aeque principaliter with Diocese of Pistoia (from 22 September 1653 to 25 January 1954)
• Diocese of Bitonto united aeque principaliter to Diocese of Ruvo (from 27 June 1818 to 30 September 1982)
• Diocese of Brugnato united aeque principaliter with Diocese of Luni-Sarzana (from 2 October 1820 to 30 September 1986)
• Diocese of Cervia united aeque principaliter with the Archdiocese of Ravenna (from 22 February 1947 to 30 September 1986)

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