The Diocese of Città di Castello () is a Latin diocese of the Catholic Church in the ecclesiastical province of the metropolitan Archdiocese of Perugia-Città della Pieve, in the central Italian region of Umbria."Diocese of Città di Castello " GCatholic.org. Gabriel Chow. Retrieved 26 March 2017."Diocese of Città di Castello" Catholic-Hierarchy.org. David M. Cheney. Retrieved February 29, 2016.

Its cathedral episcopal see is a Minor basilica: Basilica Cattedrale di Ss. Florido e Amanzio Basilica, dedicated to Saints Floridus (the diocesan patron saint) and Amantius, in Città di Castello. The province and diocese have a Marian second Minor Basilica: Santuario-Basilica della Madonna del Transito Santuario, in Canoscio.

History Territory During the persecution of Diocletian (303), St. Crescentianus, a Roman knight, and ten others suffered martyrdom at Tifernum. Crescentianus killed a dragon before he was decapitated.Lanzoni, pp. 482-483. The story is not earlier than the 7th century. His body was discovered in 1360. The bishopric was erected circa 450 AD. In 550, by order of the Ostrogothic king Totila, the city then known as Tifernum or Civitas Tiberina was captured and destroyed.Benigni, "Citta di Castello,"Catholic Encyclopedia Vol. 3 (New York 1908), p. 793, says: "At the time of the sack of the city by Fantalogus (550), the bishop was Florius, later a friend of St. Gregory the Great." The bishop's name was Floridus, not Florius, and he is attested forty years later than the destruction. Benigni is the only author who mentions "Fantalogus" Città di Castello was later rebuilt around a castle, giving origin to the name used today.Cappelletti IV, p. 485.

In 590, the diocese of Tifernum gained territory from the suppressed Diocese of Sant'Angelo in Vado. The bishop was Floridus, who attended the synod of Pope Gregory I in 593.Lanzoni, p. 483, no. 3. He makes no mention of a Florius in 550.

By the Donation of Pepin (752), it became subject to the Holy See. It lost territories in 1013, to establish the Territorial Abbey of Sansepolcro, and on 19 June 1325 to establish the Diocese of Cortona.

The first-known bishop of this see was Ennodius, present at a Roman council (465) under Pope Hilary.

In 711 Arian Longobards put to death the bishop of the city, Albertus, and his deacon Britius.

In 875 Bishop Rainaldus was summoned to appear before the papal apocrisiarius Gregory and the magister militum Georgius, the vestiarius of the Patriarch of Aquileia, to answer a charge of homicide. Having failed to deal with the situation, despite several letters of excommunication, Rainaldus was summoned by Pope John VIII to appear in Rome and stand trial. Rainaldus appeared at the papal court, but stealthily avoided taking his seat in the synod, and instead fled the city by going over the walls like a thief. Revealing himself to be guilty, he was immediately excommunicated and interdicted. The Pope announced the result in a letter to the Emperor Louis.Kehr, IV, pp. 99-100, nos. 1-2.

Pope Celestine II (Guido di Castello) (1143–1144) was a native of Città di Castello.Mangherini-Graziani II, p. 59. Salvador Miranda, The Cardinals of the Holy Roman Church, "Guido di Castello"; retrieved: 30 October 2018.

In 1320 Margaret of Castello died.

In 1375 Città di Castello joined in the insurrection of other cities of the Papal States. Cardinal Robert of Geneva (later Pope Clement VII, Avignon Obedience), undertook to recapture it with Breton mercenaries, but was repulsed. Under Pope Martin V, however, it was taken by Braccio da Montone (1420). Later, Nicolò Vitelli, with the help of Florence and Milan, became absolute ruler.

In 1474 Pope Sixtus IV sent an army commanded by his nephew, Cardinal Giuliano della Rovere (later Pope Julius II). After fruitless negotiations Cardinal Giuliano laid siege to the city, but Vitelli did not surrender until he learned that the command of the army had been given to Duke Federigo of Urbino. The following year Vitelli tried unsuccessfully to recapture the city; fear of Cesare Borgia alone induced him to desist.Umberto Benigni (1908), "Città di Castello." The Catholic Encyclopedia. Vol. 3. New York: Robert Appleton Company, 1908. Retrieved: 29 Oct. 2018.

On 22 September 1515 it lost more territory to the Territorial Abbey of Sansepolcro.

Synods

A diocesan synod was an irregular but important meeting of the bishop of a diocese and his clergy. Its purpose was (1) to proclaim generally the various decrees already issued by the bishop; (2) to discuss and ratify measures on which the bishop chose to consult with his clergy; (3) to publish statutes and decrees of the diocesan synod, of the provincial synod, and of the Holy See.

Bishop Giovanni Battista Lattanzi (1750–1782) held his first diocesan synod on 23–25 September 1766.

Bishop Francesco Antonio Mondelli (1814–1825) held a diocesan synod on 8–10 April 1818.

Bishop Giovanni Muzi held a diocesan synod on 1 June 1835.

Letterio Turchi (1850–1861) held a diocesan synod on 14–16 June 1853.

Bishops to 1200

Ennodius (attested 465)Ennodius (Eubodius): Lanzoni, p. 483, no. 1. ... [Marius ? (499)]Lanzoni, p. 495: "Sottoscrive « ecclesiae tifernatium ». Fu dunque di Tifernum Metaurum o di Tifernum Tiberinum ? Parrebbe del secondo." Tiferinum Tiberinum is Città di Castello. Innocentius (attested 501, 502)Lanzoni, p. 483, no. 2. ... Floridus (attested c. 590)Bishop Floridus is mentioned by Pope Gregory I in one of his Dialogues (III. 35), composed ca. 593: Floridus episcopus nuper narravit.... The word nuper suggests a recent acquaintance. Lanzoni, pp. 427 and 483 no. 3. Gams, p. 683, dates him c. 580–600. ... Luminosus (attested 649).Bishop Luminosus was present at the Lateran synod held by Pope Martin I in October 649. Lazzari, p. 33. Ughelli, p. 1318. J.-D. Mansi (ed.), Sacrorum Conciliorum nova et amplissima collectio, editio novissima, Tomus X (Florence: A. Zatta 1764), p. 866. ... Albertus (c. 700–711)Bishop Albertus is said to have become bishop in 700, and to have served for eleven years. He died in 711. Lazzari, pp. 33-34. Cappelletti, pp. 588-589. Theodorus (attested 715)Theodorus sat with other bishops in a court of arbitration between the bishops of Arezzo and Siena; the judgment was ratified by King Liutprand, who mentioned Theodorus in the document. Cappelletti, pp. 589-590. Gams, p. 683 column 2. Tacipertus (attested 752)Tacipertus: Cappelletti, p. 590. Bonifacius (attested 761)Bishop Bonifacius was present at the Roman council of 761. Cappelletti, p. 590. Leo (attested 769)Bishop Leo was present at the Roman synod of 769. Cappelletti, p. 590. ... Ingizo (attested 967–999)Bishop Ingizo attended the synod of Ravenna held by Pope John XIII in 967. He was present at the Roman synod of 999. Schwartz, p. 279. ...''' Pietro (Petrus) (1023? – 1048)Gams (p. 683) makes his administration begin in 1012 and end in 1036. Bishop Pietro may have attended the Roman Synod of 3 January 1015. Czortek (2016), p. 164, prefers the dates 1015–1049. Schwartz, p. 279. Pietro (1048? – ?)An idea of Gams, p. 683. Ermanno (Herman) (attested 1050 – 1059)On 2 May 1050 Bishop Herimannus attended the Roman synod of Pope Leo IX. On 13 April 1059 he was present at the Roman synod of Pope Nicholas II. Muzi, II, pp. 29-30. Schwartz, p. 279. Czortek (2016), pp. 170-171. Fulcone (attested 1068)Bishop Fulco presented relics of S. Crescenziano to Mainard bishop of Urbino in 1068. Schwartz, p. 279. Czortek (2016), p. 171. Tebaldus (1071–1101 ?)Tebaldus was a follower of the Emperor Frederick Barbarossa. He first appears in a document of 1 October 1071, the day on which he was named a bishop. On 27 February 1286, he was present at the schismatic synod of the Antipope Clement III (Archbishop Wibert of Ravenna). He died on 4 November, in 1100, or 1101, or 1102, or 1103. Schwartz, pp. 279-280. Gams, p. 683, makes the year of death 1100. Czortek (2016), p. 164, prefers the dates 1071–1101. Ridolfo (c. 1102–1105)Ridolfo (Rodolfo) is remembered in the Necrology of the Canonica of Città di Castello on 29 September. Pope Paschal II wrote to his successor on 10 April 1106. Muti, II, pp. 40-41. Gams, p. 683 column 2. Giovanni (John) (1105 – death 1124.09.12) Ranieri (1124–1129)According to the Necrology of the Cathedral, Ranieri died on 15 June. Since he was still living in November 1128, his death must have occurred in 1129. Muti, II, pp. 46-49. Gams, p. 683, column 2. Guido (1135 – death 1137.05.14) Divizzo (1141 – 1146) Ubaldo (? – 1150?) Pietro first time (1153.10.10 – 1167), see below Tedelmanno (? – 1167?) Pietro again see above (1172 – death 1178.07.28) Ranieri (1178 – death 1204.06.07)

1200 to 1500

Rolando (1205–1206)Rolandus: Cappelletti, p. 625. Gams, p. 683. Eubel, I, p. 190. Giovanni (1206–1226)Joannes: Cappelletti, pp. 625-626. Gams, p. 683. Eubel, I, p. 190. Cortosonno (1227–1228)Cortensonus: Gams, p. 683. Eubel, I, p. 190. Matteo Suppolini (1229–1233)Matthaeus: Gams, p. 684. Eubel, I, p. 190. Azzo (1234–1251)Azzo: Gams, p. 684. Eubel, I, p. 191. Pietro Rossi (1252–1265)Bishop Petrus Rubeus was appointed by Pope Innocent IV on 29 July 1252. Gams, p. 684. Eubel, I, p. 191. Niccolò, O. Praem. (1265–1279)Nicolaus had been the abbot of the monastery of S. Severo in Orvieto. He was appointed Bishop of Città di Castello by Pope Clement IV on 25 August 1265. He died before 5 March 1279. Gams, p. 684. Eubel, I, p. 191. Giacomo Cavalcanti (1279–1301)Cavalcanti had been a Canon of the Cathedral Chapter of Orvieto. He was elected bishop, and also provided by Pope Nicholas III 25 May 1279. He died in October 1301. Eubel, I, p. 191. Ugolino Gualterotti (1301–1320)Gualterotti was appointed by Pope Boniface VIII on 6 November 1301. He died in 1320, before 16 March. Eubel, I, p. 191. Ugolino della Branca (1320.03.16 – death 1346)Della Branca: Eubel, I, p. 191 with note 9. Pietro Riccardi (1347.02.19 – 1358) Buccio Bonori (1358.05.04 – death 1374.08.26) Niccolò Marciari (1374.12.04 – 1378), previously Bishop of Pesaro (Italy) (1359.07.12 – 1370.07.01), Bishop of Fermo (Italy) (1370.07.01 – 1374.12.04); later Bishop of Orvieto (Italy) (1378 – 1398.07.07), Bishop of Cagli (Italy) (1398.07.07 – 1414) Ettore Orsini (1379.10.07 – 1387.07.17) Bandello Bandelli (1387.07.15 [1387.09.16] – 1407.03.14), next Bishop of Rimini (Italy) (1407.03.14 – 1408.09.10), remaining Apostolic Administrator of Rimini (1408.09.10 – death 1416.10), created Cardinal-Priest of S. Balbina (1408.09.19 – 1416.10) Giovanni del Pozzo (1407–1409)Giovanni del Pozzo was a chamberlain of Pope Gregory XII. He was appointed Bishop of Città di Castello on 3 June 1407, and was sent by him as Nuncio to Venetian territory. On 13 August 1408 he was appointed Gregory's Registrar of bulls. When Gregory XII was deposed by the Council of Pisa, Bishop Giovanni was deposed by Pope Adrian V on 9 August 1409. Gregory appointed a successor to Giovanni del Pozzo, on Fr. Illuminatus. Eubel, I, p. 191 with note 11. Bernardo Bartolomei, O.S.M. (1409–1423)Bernardus had been abbot of the monastery of S. Michael in the diocese of Florence. He was appointed Bishop of Città di Castello by Pope Alexander V on 9 August 1409. He died in November 1423. Muti, II, pp. 245-248. Eubel I, p. 191 with note 13. Sirubaldo degli Ubaldi (1424–1441)Sirubaldo was appointed Bishop of Città di Castello by Pope Martin V on 10 January 1424. He was deposed in 1441. Eubel, I, p. 191; II, p. 130. Radulphus, O.S.A. (8 March 1441 – death 9 June 1460) Giovanni Gianderoni, O.S.A. (4 July 1460 – 15 July 1474), next Bishop of Massa Marittima (1474.07.15 – death 1483) Bartolomeo Maraschi (15 July 1474 – death Sep 1487) Giovanni Battista Lagni (27 Sep 1487 – 18 Jan 1493), next Archbishop of Rossano (1493.01.13 – death 1500?)