Roman Catholic Suburbicarian Diocese of Ostia

The Roman Catholic Suburbicarian Diocese of Ostia is an ecclesiastical territory located within the Metropolitan City of Rome in Italy. It is one of the seven suburbicarian dioceses. The incumbent Bishop is cardinal Giovanni Battista Re. Since 1150, its bishop has been the Dean of the College of Cardinals.^[1] Its Cathedral is Basilica di Sant'Aurea.

From 1105 to 1914, the diocese was merged with the Suburbicarian Diocese of Velletri. In 1962, the Diocese of Ostia was brought under the direct administration of the Diocese of Rome.

^ The Cardinals of the Holy Roman Church – Guide to documents and events (76–2005) This statement of Miranda is unsourced. Moreover, Rudolf Hüls (pp.79–80) has demonstrated that the perpetual leadership of the Bishop of Ostia is not the case, but that the principle of seniority held true in Rome as it did elsewhere (cf. Hüls, pp. 77–78), before and after Pope Eugenius III. It was not until Pope Paul IV that the Deanship and the Bishopric of Ostia were tied together, in his Bull of 22 August 1555, Cum venerabiles. Bullarum diplomatum et privilegiorum sanctorum Romanorum pontificum Taurensis editio (in Latin). Vol. Tomus sextus (6). Seb. Franco. 1860. pp. 502–504.

[1] The Cardinals of the Holy Roman Church – Guide to documents and events (76–2005) This statement of Miranda is unsourced. Moreover, Rudolf Hüls (pp.79–80) has demonstrated that the perpetual leadership of the Bishop of Ostia is not the case, but that the principle of seniority held true in Rome as it did elsewhere (cf. Hüls, pp. 77–78), before and after Pope Eugenius III. It was not until Pope Paul IV that the Deanship and the Bishopric of Ostia were tied together, in his Bull of 22 August 1555, Cum venerabiles. Bullarum diplomatum et privilegiorum sanctorum Romanorum pontificum Taurensis editio (in Latin). Vol. Tomus sextus (6). Seb. Franco. 1860. pp. 502–504.

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