The Roman Catholic Diocese of Pedena () was a Catholic diocese located in the town of Pedena (modern day Pićan) in the central part of Istria, Croatia, 12km southeast of Pazin. Pedena is now the name of a Latin titular see.

History The date of the establishment of the Diocese of Pedena (Italian) / Petina (Latin) / Pićan (Croat) / Petinen(sis) (Latin adjective) cannot be discerned, based on current evidence.Paul Fridolin Kehr, Italia pontificia Vol. VII. 2 (Berlin: Weidmann 1925), p. 240: "Origines Petenensis sive Petinensis episcopatus, licet de antiquitate eius dubitari nequeat, in tenebris latent." It was in existence by the second half of the 6th century.

In 996, the Emperor Otto III confirmed the suffragan status of the diocese of Pedena with regard to the Patriarchate of Aquileia.Monumenta Germaniae Historica. Diplomatum regum et imperatorum Germaniae, Vol. II (Hannover: Hahn 1893), pp. 626–627, no. 215: "... confirmamus atque largimur iam dictae sanctae Aquilegensi aecclesiae atque Iohanni predicto venerabili patriarchae suisque successoribus suprascriptos episcopatus sex, unum videlicet Concordiensem, alium Utinensem, tertium illum qui apud Civitatem novam Histriae constitutus esse noscitur, quartum vero Ruginensem, quintum Petenensem, sextum Tarsaticensem."

On 2 April 1237, Pope Gregory IX wrote to the bishop of Emona (Cittanova) and the bishop-elect of Trieste, expressing his concern that the diocese of Aquileia was far too extensive for the patriarch to administer it adequately, particularly the eastern parts in the neighborhood of Hungary, in which he could not perform visitations. There were vacancies of pastors and people were dying without being anointed or were suffering without having sufficient spiritual care so that they were falling into error. The patriarch had suggested that the seat of the bishop of Pedena be moved to the monastery of Obremburch (Oberburgense, Ottemburg), which was directly subject to the Patriarchate. The two prelates were ordered to investigate the situation of Aquileia and of Pedena to see whether a mutually agreeable solution to the problems could be worked out.Agostino Theiner, Vetera monumenta Slavorum meridionalem historiam illustrantia, , Vol. 1 (Rome: Typis Vaticanis 1863), pp. 75–76, no. 91, Paul Fridolin Kehr, Italia pontificia Vol. VII. 2 (Berlin: Weidmann 1925), p. 240; Vol. VII. 1, p. 15: "In Styria australi: monasterium b. Mariae in Oberburg ord. s. Benedicti a Peregrine patriarcha et Diepaldo de Chagere a. 1140 conditum." Nothing further is known, except that the seat of the diocese was not moved.

The Patriarchate of Aquileia was suppressed by Pope Benedict XIV, who, on 18 April 1752, created the Archdiocese of Gorizia, and made Pedena subject to Gorizia.

In 1766, the city of Pedena was inhabited by c. 200 Catholics. The entire diocese contained 24 loca. The cathedral of Pedena was dedicated to Saint Nicephorus (Nikefor). The new cathedral was built on its ruins in the 14th century and dedicated to the Virgin Mary. It was staffed and administered by one dignity, the Archdeacon, and three canons, later reduced to two.Ughelli V, p. 470; Ritzler & Sefrin, Hierarchia catholica VI, p. 334 note 1. It is currently the parish church of the village, and Mass is celebrated in Old Church Slavonic.

From 1788, a series of administrative changes took place in northeastern Italy. The bishop of Pedena, Aldrago Antonin de Piccardi had been transferred to the diocese of Senj e Modruš (Croatia) on 14 February 1785 and was not replaced. On 20 August 1788, diocese of Pedena was suppressed, and its territory was added to that of Gradisca.Ritzler & Sefrin, Hierarchia catholica VI, p. 334 notes 1 and 3; Piccardi died in Trieste on 13 September 1789: Ritzler & Sefrin, p. 372 note 6. Under pressure from Emperor Joseph II, Pope Pius VI then abolished the diocese of Trieste and Archdiocese of Gorizia in 1788, merging them into the new diocese of Gradisca.Pius VI, "Super Specula," 20 August 1788, in: Bullarii Romani Continuatio, Vol. 8 (Rome: Typographia Reverendis Camerae Apostolicae 1844), pp. 210-218; Ritzler & Sefrin VI, p. 334 note 1; Gabriel Chow, GCatholic.org, "Titular Episcopal See of Pićan"; retrieved 22 March 2017.. Pius VI, "Ad Supremum", 12 September 1791, in: Bullarii Romani Continuatio, Vol. 9 (Rome: Typographia Reverendis Camerae Apostolicae 1845), pp. 53-62 § 11; Cappelletti VIII, p. 763, 775.

In 1969, the name "Pedena" was revived as the name of a Titular Episcopal See.

Bishops of Pedena To 1300

... [Nicephorus (524)]There is no evidence for the date; it is a scholarly guess. Nicephorus was an eastern martyr, but not a bishop of Pedena. Lanzoni, pp. 854–855: "Il s. Niceforo martire venerato a Pedena il 28 maggio (cf. Acta Sanctorum, mai, VII, 796) non consta affatto fosse vescovo locale. La sua memoria è circondata di favole assurde, desunte in parte dalla Vita di s. Geronzio di Cervia (cf. Delbhaye, Sanctus, pp. 219–220)"; Cappelletti VIII, pp. 764–765. [Theodorus (546)]Mention of Bishop Theodorus occurs only in a forged diploma of Maximianus in favor of the church of S. Maria Formosa in Pola, Cappelletti VIII, p. 765; Lanzoni, p. 855. Marcianus (attested 571–577)Marcianus was present at the synod of Grado in 577; Lanzoni, p. 855. ... Ursinianus (attested 670)Bishop Ursinianus took part in the Roman synod of Pope Agatho in 679 and signed the synodal letter sent to the Council of Constantinople, Cappelletti VIII, p. 765. ... Fredebertus (attested 961–966)Fredebertus: Ughelli V, p. 402; Schwartz, p. 39. ... Stephanus (attested 1015)Bishop Stephenus attended the synod of Aquileia in 1015, Cappelletti VIII, p. 766; Schwartz, p. 39. ... Voldaricus (attested 1031)Bishop Voldaricus subscribed a document of Patriarch Poppo on 13 July 1031, Cappelletti VIII, p. 766; Schwartz, p. 39. ... PetrusBishop Petrus subscribed a document for Patriarch Udalricus, who governed from 1086 to 1121), Cappelletti VIII, p. 766; Schwartz, p. 39. ... Gotpoldus (attested 1136)Gotpoldus: Gams, p. 801; Cappelletti VIII, p. 766. ... Conradus (attested 1170)Conradus: Gams, p. 801; Cappelletti VIII, p. 766. Federicus (attested 1175–1176)Bishop Federicus subscribed a diploma of Patriarch Vodalricus of Aquileia. In 1176, he witnessed a donation made by Count Engelbert of Gorizia. Gams, p. 801; Cappelletti VIII, p. 766. Poppo (attested 1180–1188)Poppo: Ughelli V, p. 471 (Pepo); Cappelletti VIII, p. 766. ... Vigardus (attested 1200)Vigardus: Cappelletti VIII, p. 766. Federico (1200–1203) Popone (attested 1213–1231)Poppo: Cappelletti VIII, p. 761; Eubel I, p. 397 (from Gams, p. 801). Sede vacante (1238)Cappelletti VIII, p. 761; Gams, p. 801. Pietro di Montemarte (1239? – ?) Enrico (attested 1253)Henricus de Orzano had been Provost of Cividale. Cappelletti VIII, p. 767; Eubel I, p. 397. Otone da Parenzo (attested 1254)Otto: Cappelletti VIII, p. 767; Eubel I, p. 397. Bernardo (1263? – ?) Vixardus (attested 1267)Vixardus (Viscardo): Cappelletti VIII, p. 767 (giving the date of 1263); Eubel I, p. 397. Bernardo (1275? – 1284?) Ulrico (1295 – ?)Ulricus: Eubel I, p. 397.

1300 to 1500

Odorisio Bertrami, O.P. (1300 – death 1310)Odorisius: Eubel I, p. 397. Enoch, O.E.S.A. (attested 1310) Demetrius () Guglielmo (1339? – 1343)Guilelmus: Eubel I, p. 397. Amantius, O.F.M. Conv. (1343)Fra Amantius was appointed by Pope Clement VI on 17 February 1343. He died at the papal court in Avignon before 21 April of the same year. It is unlikely that he was ever installed in the cathedral of Pedena. Eubel I, p. 397. Stanislao da Cracovia, O.P. (21 April 1343 – ?) Demetrio dei Matafari (1345–1354)Bishop Demetrius de' Matafari (or Matafori) was a native of Zadar (Zara, Dalmatia), and had become archdeacon of the cathedral of Zara. He was appointed bishop of Pedena by Pope Clement VI on 23 February 1345. He was transferred to the diocese of Nona (Nin, Croatia) on 22 February 1354. He died around 1387, when Antipope Clement VII (Avignon Obedience) appointed a successor on 17 August 1387. Cappelletti VIII, p. 768; Eubel I, pp. 370, 397. Nicolò (attested 1354)A native of Cervia, Nicolaus was chosen by the canons and clergy of Pedena, and appointed bishop of Pedena by Pope Innocent VI on 28 March 1354. He died . Cappelletti VIII, p. 768; Eubel I, p. 397. Lorenzo (attested 19 April 1372) Andrea Bon (1394–1396) Roman ObedienceBishop Bon(o) was previously Bishop of Caorle (Italy) (1382–1394). On 16 February 1394, appointed by Urban VI (Roman Obedience); he was transferred to the diocese of La Canea (Agiensis, Crete) by Pope Boniface IX (Roman Obedience) on 12 April 1396. He died before 13 August 1400. Cappelletti VIII, p. 768; Eubel I, pp. 77, 164, 397. Enrico de Wildenstein, O.F.M. (1396 – ?) Roman ObedienceHenricus had been Bishop of Trieste. He was transferred to Pedena by Boniface IX on 23 December 1396, having been accused by the Chapter and clergy of Trieste of prodigality. Cappelletti VIII, p. 769; Eubel I, p. 397 with note 4. ... Paolo de Nostero, O.E.S.A. (23 August 1409 – ?)Paolo da Nostero: Cappelletti VIII, p. 769; Eubel I, p. 397. Giovanni Straus, O.F.M. (18 August 1411 – ?)Giovanni was appointed by John XXIII on 18 April 1411. Eubel I, p. 397. Gregorio di Carinzia, O.E.S.A. (14 February 1418 – ?) Nicolò (1430 – death 1434) Pietro Giustiniani, O.P. (10 September 1434 – 1457)Petrus was named bishop of Pedena by Pope Eugenius IV on 10 September 1434. In October 1440, Petrus joined the Council of Basle as bishop-elect. Eubel II, p. 214 with note 2. Martino da Ljubljana (1445–1447) uncanonicalMartinus, a parish priest of Ljubljana, was nominated by the Emperor Frederick III in 1445, and appointed by the antipope Felix V. He was excommunicated by Pope Eugenius IV, and died in Ljubljana . Cappelletti VIII, p. 769. Jakob Krainburg (4 January 1457 – ?)Jacobus appears on the Oblate Rolls on 4 February 1457. Eubel II, p. 215 with note 3. Konrad Arensteiner (2 December 1461 – death 1465)Arensteiner had been Provost of the monastery of S. Andrea in Passau. He was appointed bishop of Pedena by Pope Pius II on 2 December 1461. Eubel II, p. 215 with note 4. Michele (7 June 1465 – 1478) Giorgio Maninger (31 January 1491 – ?)

after 1500

Ludovico Ruggeri (1501 – ?) George Slatkonia (1513? – 1522)Bishop von Slatkonia had been a parish priest of Ljubljana, then Canon of the cathedral, then Provost of Ljubljana. The date of his appointment to the diocese of Pedena is unknown, though he was allowed to retain the parish in Ljubljana (which he resigned in 1517). He was appointed to the diocese of Wien (Vienna, Austria) on 12 August 1513 by Pope Leo X, which he was allowed to hold along with the diocese of Pedena. He died on 26 April 1522. Cappelletti VIII, p. 770; Eubel III, p. 290 with note 3. Nikolaus Creutzer, O.F.M. (1523–1525)Creutzer (Craiz, on one of his monuments) belonged to a noble family of Carinthia. He was appointed by Pope Adrian VI on 30 January 1523. He died on 2 October 1525. Cappelletti VIII, p. 770; Eubel III, p. 290 Giovanni Barbo (1526–1547)A relative of Pope Paul II (Barbo), Giovanni had been Rector of the parish of S. Martin in Hrenoviza (Crenobitz, diocese of Trieste) and canon of the cathedral of Trieste. He was nominated bishop of Pedena by the Emperor Charles (as Archduke of Austria) and confirmed by Pope Clement VII on 16 April 1526; he was permitted to keep the parish of S. Martin. He built the Chapel of S. Anna and S. Giovanni Battista in the episcopal palace. He died on 16 January 1547. Cappelletti VIII, pp. 770–771; Eubel III, p. 290 with note 4. Zaccaria Giovanni Divanic (23 May 1550 – 9 March 1562)Zacharias Joannis Perconick (Givanicz): Cappelletti, p. 771; Eubel III, p. 290 with note 5. Daniele Barboli, O.P. (1563–1570)Barboli was appointed bishop of Pedena by Pope Pius IV on 4 June 1563. He died on 25 February 1570. Cappelletti, p. 771; Eubel III, p. 290 with note 6.