Suburbicarian Diocese of Ostia
Roman Catholic diocese in Rome, Italy
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. For centuries, its bishop has been the dean of the College of Cardinals. Its cathedral is Santa 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. Its territory is restricted to the single cathedral parish of Santa Aurea.
Bishops
Bishops of Ostia (–1057)
Bishops of Ostia and Velletri (1057–1378)
Western Schism
Obedience of Rome (1378–1415) (actually in control of Ostia)
Philippe of Alençon, 1388–1397 (also Cardinal-bishop of Sabina, 1380–1388)
Angelo Acciaioli, 1405–1408
Obedience of Avignon (1378–1429)
Bertrand Lagier (1378–1392)
John de Neufchatel (1392–1398)
Leonardo Rossi da Giffoni (1398–1405)
Jean-Allarmet de Brogny (1405–1408)
Julian Lobera y Valtierra (1423–1429)
Obedience of Pisa (1409–1415)
Jean-Allarmet de Brogny (1409–1415)
Bishops of Ostia and Velletri (1415–1914)
Bishops of Ostia (1914–)
Serafino Vannutelli (1914–1915)
Vincenzo Vannutelli (1915–1930)
Granito Pignatelli (1933–1948)
Francesco Marchetti-Selvaggiani (1948–1951)
Eugène Tisserant (1951–1972)
Amleto Giovanni Cicognani (1972–1973)
Luigi Traglia (1974–1977)
Carlo Confalonieri (1977–1986)
Agnelo Rossi (1986–1993)
Bernardin Gantin (1993-2002)
Joseph Ratzinger (2002–2005); became Pope Benedict XVI
Angelo Sodano (2005–2019)
Giovanni Battista Re (2020–)
See also
Diocese of Rome#Diocese of Ostia
Roman Catholic Suburbicarian Diocese of Velletri–Segni
References
Books
Bräuer, Martin (2014). Handbuch der Kardinäle: 1846–2012 (in German).
The public source identifies “Suburbicarian Diocese of Ostia” as roman Catholic diocese in Rome, Italy. This brief keeps that definition visible, then builds a research path around Suburbicarian, Diocese and Ostia.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jan 10, 2026. The linked authority identifier is Q2623978. Authority coordinates are 41.759, 12.302. None of the 2 selected statements returned an explicit reference. The first chronological checks are 1105, 1914, 1962 and 1057.
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