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.The Cardinals of the Holy Roman Church – Guide to documents and events (76–2005) 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)
Maximus (259)According to the Passio S. Hippolyti, the first Maximus consecrated Pope Dionysius and was the first Bishop of Ostia to consecrate a pope, but the historical value of the document is in question: Lanzoni, p. 109: "Ma che questo privilegio, nel 259, fosse esercitato da un vescovo di nome Massimo non potrebbe affermarsi sicuramente su la fede della Passione di S. Ippolito, documento romanzesco e pieno di errori." ... Maximus (313)Maximus of Ostia was present at the Roman synod of October 313, conducted by Pope Miltiades. J. D. Mansi (ed.) Sacrorum Conciliorum nova et amplissima collectio editio novissima Tomus secundus (2) (Florence 1759), p. 437. Florentius (366)Bishop Florentius consecrated Pope Damasus. Lanzoni, p. 109. ... Bonus (487). Bellator (499)Bellator of Ostia subscribed to the decrees of the Roman Synod of February–March 499, held by Pope Symmachus. Mansi, Tomus Octavus (8), p. 235. Bishop Boniface of Velletri also subscribed, p. 233. Aristus (502)Aristus was present at the Synod held by Pope Symmachus in 502. Ughelli, p. 47. Mansi, Vol.8, p. 299 and 308. ... Amabile (649)Amabile subscribed the Canons of the Roman Synod of 649. Ughelli, p. 49. Mansi, Tomus decimus (10), p. 366. ... Andrea(s) (680)Andrea was present at the Roman council of Pope Agatho in 680. Ughelli, p. 49; Mansi, Tomus undecimus (11), p. 179. ... Sissinio 732 – before 745 Theodorus (745)Theodorus was present at the second Roman synod of Pope Zacharias in October 745. Ughelli, p. 49. Mansi, Tomus duodecimus (12), p. 384. George I, 753–786Bishop George was present at the Lateran council of 769: J. D. Mansi (ed.) Tomus duodecimus (12), p. 714. He was also present at a council in Mercia in 786: Dorothy Whitelock (2007 ), English Historical Documents, c.500–1042, 2nd ed., p. 292. ... Gregory I, 787 – before 804 Bernard 804–805 Peter I 805 – before 826 Cesareo 826–854 Megisto (or Leo I), 854–868 Donatus, 868–870 sede vacante 870–878 Eugenius, 878–898 Stephen, 898–900 Guido I, 900–946 Benigno, 946–960 Siccone, 960–963 Gregory II, 964–969 Leo II, 969–983 vacant 983–996 Azzone I, 996Source for the period 996–1057: Otto Kares, Chronologie der Kardinalbischöfe im elften Jahrhundert, (in:) Festschrift zur Jahrhundertfeier des Gymnasiums am Burgplatz in Essen, Essen 1924, pp. 20, 23–25 Gregory III, 998–1012 Azzone II, 1012–1021 Peter III, 1021–1037 Benedict, 1044–1050 John I, 1050–1058
Bishops of Ostia and Velletri (1057–1378)
Peter IV Damiani, 1057–1072Sources for the period 1057–1130: Hans-Walter Klewitz, Reformpapsttum und Kardinalkolleg, Darmstadt 1957; and Rudolf Hüls, Kardinäle, Klerus und Kirchen Roms: 1049–1130, Tübingen 1977. Both authorities indicate that the see of Velletri was united to Ostia in April 1060. Gerald of Ostia, 1072–1077 Odo I de Lagery, 1078–1088 (became Pope Urban II) Odo II, 1088–1102 Leo of Ostia, ca. 1103–1115 Lamberto Scannabecchi, 1116–1124 (later Pope Honorius II) Giovanni of Camaldoli, 1126–1134Source for the period 1130–1181: J.M.Brixius, Die Mitglieder des Kardinalkollegiums von 1130–1181, Berlin 1912, p. 134 Drogo of Champagne, 1136–1138Drogo was appointed by Pope Innocent II while he was in exile in Pisa in 1134. His predecessor's latest document was signed on 4 June 1133; his successor was signing documents on 9 April 1138. Ughelli, pp. 62–63. P. Jaffé, Regesta pontificum romanorum editio altera, ed. G. Loewenfeld (Leipzig:Veit 1885), p. 840. Barbara Zenker, Die Mitglieder des Kardinalcollegiums von 1130 bis 1159 (Würzburg 1964), pp. 13–15. Alberic, 1138–1148 Guido II de Summa, 1149–1151 Hugo, 1151–1158 Ubaldo Allucingoli, 1159–1181/84 (became Pope Lucius III in 1181) Theobald, 1184–1188 Ottaviano di Paoli, 1189–1206 Ugolino di Conti 1206–1227/31 (became Pope Gregory IX) Rinaldo dei Signori di Ienne, 1231–1254/61 (became Pope Alexander IV in 1254) Hugh of Saint-Cher 1261–1262 Enrico Bartolomei 1262–1271 vacant 1271–1273 Peter VI de Tarentaise, 1273–1276 (later Pope Innocent V, † 1276) vacant 1276–1278 Latino Malabranca Orsini, 1278–1294 Hugh Aycelin, 1294–1297 Leonardo Patrasso, apostolic administrator 1298–1299 Niccolo I Boccasini, 1300–1303 (became Pope Benedict XI) Niccolò Albertini, 1303–1321 Regnaud de La Porte, 1321–1325 vacant 1325–1327 Bertrand du Pouget, 1327–1352 Étienne Aubert, 1352 Pierre Bertrand de Colombier, 1353–1361 Andouin Aubert, 1361–1363 Hélias de Saint-Yrieix, 1363–1367 Guillaume de la Sudrie, 1367–1373 Peter d'Estaing, O.S.B. 1373–1377Pierre d'Estaing, Doctor of Canon Law, had been Bishop of Saint-Flour (1361–1368), and Bishop of Bourges (1368–1370). He was created a cardinal by Pope Urban V on 7 June 1370, and assigned the titular church of S. Maria in Trastevere. Eubel, I, p. 21, 139, 251. Bertrand Lagier, 1378 (sided with Avignon in the Great Schism)
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)
Jean-Allarmet de Brogny (1415–1426) Antonio Correr, 1431–1445Antonio Correr of Venice, the Bishop of Bologna (1407–1412), was created a cardinal by his uncle, Pope Gregory XII on 9 May 1408, and assigned the titular church of San Pietro in Vincoli. He was promoted Cardinal-bishop of Porto 1409–1431. Eubel, I, p. 31, 36, 37, 45, 141. Juan de Cervantes (1447–1453) Giorgio Fieschi (1455–1461)Fieschi (also Cardinal-bishop of Palestrina 1449–1455) Guillaume d'Estouteville (1461–1483)Estouteville had also been Cardinal-bishop of Porto, 1455–1461. Giuliano della Rovere, became Pope Julius II (1483–1503),Della Rovere had previously been Cardinal-bishop of Sabina, 1479–1483; he became Pope Julius II. Oliviero Carafa (1503–1511)Carafa (also Cardinal-bishop of Albano, 1476–1483 and Sabina, 1483–1503) Raffaele Riario Sansoni (1511–1521)Riario had also been Cardinal-bishop of Albano 1503–1507, Sabina 1507–1508 and Porto 1508–1511. Bernardino López de Carvajal (1521–1523)Carvajal (also Cardinal-bishop of Frascati 1507–1509, Sabina 1509–1521 and Palestrina 1508–1509) Francesco Soderini (1523–1524)Soderini had also been Cardinal-bishop of Albano 1516–1517, Palestrina 1516–1523 and Porto 1523. Niccolò Fieschi (1524)Fieschi had also been Cardinal-bishop of Albano 1518–1521, Sabina 1521–1523 and Porto 1523–1524. Salvador Miranda, The Cardinals of the Holy Roman Church , Consistory of May 31, 1503 Alessandro Farnese, became Pope Paul III(1524–1534)Farnese had also been Cardinal-bishop of Frascati 1519–1523, Palestrina 1523, Sabina 1523–1524 and Porto 1524; became Pope Paul III) Giovanni Piccolomini, 1535–1537Giovanni Nanni Tedeschini-Piccolomini, Bishop of Siena (1503–1529), was created a cardinal by Pope Leo X on 1 April 1517, and assigned the titular church of Santa Sabina. In 1521 he was transferred to Santa Balbina. On 24 July 1524 he was promoted Cardinal-bishop of Albano (1524–1531); then on 22 September 1531 he was promoted to Palestrina (1531–1533); and then to Porto (1533–1535). Eubel, III, p. 15, 55–57, 297. Giovanni Domenico de Cupis, 1537–1553De Cupis was also Cardinal-bishop of Albano 1531–1533 and Sabina 1533–1535. Giovanni Pietro Carafa, 1553–1555Carafa was also Cardinal-bishop of Albano 1544–1546, Sabina 1546–1550, Frascati 1550–1553 and Porto 1553. He became Pope Paul IV (1555–1559). Jean du Bellay 1555–1560Bellay had also been Cardinal-bishop of Albano 1550–1553, Frascati 1553 and Porto 1553–1555. François de Tournon, 1560–1562Tournon had also been Cardinal-bishop of Sabina 1550–1560. Rodolfo Pio da Carpi, 1562–1564Pio da Carpi (also Cardinal-bishop of Albano 1550, Frascati 1553–1555 and Porto-Santa Rufina 1555–1562) Francesco Pisani, 1564–1570Pisani (also Cardinal-bishop of Albano 1555–1557, Frascati 1557–1562 and Porto 1562–1564) Giovanni Morone, 1570–1580Morone (also Cardinal-bishop of Albano 1560–1561, Sabina 1561–1562, Frascati 1562, 1564–1565, Palestrina 1562–1564 and Porto 1565–1570) Alessandro II Farnese, 1580–1589Farnese had also been Cardinal-bishop of Frascati 1565–1578, Sabina 1564–1565 and Porto 1578–1580. Giovanni Antonio Serbelloni, 1589–1591Serbelloni (also Cardinal-bishop of Frascati 1583–1587, Sabina 1578, Palestrina 1578–1583, Porto 1587–1589) Alfonso Gesualdo, 1591–1603Gesualdo (also Cardinal-bishop of Albano 1583–1587, Frascati 1587–1589 and Porto 1589–1591) Tolomeo Gallio, 1603–1607Gallio, Bishop of Manfredonia (1562–1573), who had been the private Secretary of the Pope, had been named a cardinal by Pope Pius IV in the Consistory of 12 March 1565, and was assigned the Deaconry of San Teodoro. He was promoted to San Pancrazio on 7 September 1565. He was then promoted Cardinal-bishop of Albano on 2 March 1587; then Bishop of Sabina (1589–1591) on 2 March 1589; Frascati 1591–1600; and Porto 1600–1603. Eubel, III, p. 40, 56, 58, 68, 76, 301. Gauchat, IV, p. 36. Domenico Pinelli, 1607–1611Pinelli had previously been Cardinal-bishop of Frascati 1603–1605 and Porto 1605–1607. François de Joyeuse, 1611–1615Joyeuse had previously been Cardinal-bishop of Sabina 1604–1611. Antonio Maria Galli, 1615–1620Galli had previously been Cardinal-bishop of Frascati 1605–1608, Palestrina 1608–1611 and Porto 1611–1615. Antonio Maria Sauli, 1620–1623Sauli had previously been Cardinal-bishop of Albano 1607–1611, Sabina 1611–1615, and Porto 1615–1620. Francesco Maria Bourbon del Monte, 1623–1626Del Monte had previously been Cardinal-bishop of Palestrina 1615–1621; and Porto 1621–1623. Ottavio Bandini, 1626–1629Bandini had previously been Cardinal-bishop of Palestrina 1621–1624; and Bishop of Porto 1624–1626. Giovanni Battista Deti, 1629–1630A native of Florence, Deti, who was a nephew of Pope Clement VIII, was named a cardinal in the Consistory of 3 March 1599. He was first assigned the Deaconry of Sant'Adriano al Foro. He became Cardinal Priest of Santi Marcellino e Pietro al Laterano on 6 October 1614. He was promoted Cardinal-bishop of Albano (1623–1626) on 7 June 1623; of Frascati 1626; and of Porto 1626–1629. He became Bishop of Ostia on 20 August 1629. He died in Rome on 13 July 1630. Gauchat, IV, p. 6 no. 34. Domenico Ginnasi, 1630–1639Ginnasi had also been Cardinal-bishop of Palestrina 1626–1629; and of Porto 1629–1630. Carlo Emanuele Pio di Savoia, 1639–1641Pio di Savoia had also been Cardinal-bishop of Albano 1627–1630; and of Porto 1630–1639. Marcello Lante della Rovere, 1641–1652Lante della Rovere had also been Cardinal-bishop of Palestrina 1629; of Frascati 1629–1639; and of Porto 1639–1641. Carlo I de Medici, 1652–1666Medici was earlier Cardinal-bishop of Sabina 1645, of Frascati 1645–1652 and of Porto 1652. Francesco V Barberini, 1666–1679Francesco Barberini was Cardinal-bishop of Sabina 1645–1652 and Porto 1652–1666. Cesare Facchinetti, 1680–1683Facchinetti was Cardinal-bishop of Palestrina 1672–1679 and Porto 1679–1680.