The Italian Catholic Diocese of Ascoli Piceno (Latin: Dioecesis Asculanus in Piceno) in the Marche, has existed since the fourth century. Historically immediately dependent on the Holy See, it is now a suffragan of the Archdiocese of Fermo. There is, in 2015, one priest for every 1,074 Catholics.
The traces of this bishopric appear in the fourth century with St. Emidius, martyred under Diocletian and Claudius, present at the Synod of Rimini (Arian Controversy, 359). In the fifth century, Lusentius, who was present at the Synod of Milan which sent the famous letter to Pope Leo I (440-461), was bishop of Ascoli.
One of its bishops, Giulio de' Medici, afterwards became Pope Clement VII (1523–34).
Erected: 4th Century
Latin Name: Dioecesis Asculanus in Piceno
Paolo Alberti, O.F.M. (19 Oct 1422 - 1438 Died)
Valentin Narnia (28 Jan 1442 - 1447 Died)
Angelo Capranica (5 May 1447 - 25 Sep 1450 Appointed, Archbishop (Personal Title) of Rieti)
Prospero Caffarelli (11 Dec 1463 - 14 Feb 1500 Died)
Giuliano Cesarini (Jr.) (14 Feb 1500 - 1 May 1510 Died)
Lorenzo Fieschi (24 May 1510 - 15 Oct 1512 Appointed, Bishop of Mondovi)
Girolamo Ghinucci (Ginucci) (16 Oct 1512 - 30 Jul 1518 Resigned)
Giulio de' Medici (30 Jul 1518 - 3 Sep 1518 Resigned)
Filos Roverella (3 Sep 1518 - 1552 Died)
Lattanzio Roverella (26 Sep 1552 - 1566 Died)
Pietro Camaiani (7 Oct 1566 - 27 Jul 1579 Died)
Niccolò Aragonio (Aragona) (3 Aug 1579 - Jul 1586 Died)
Girolamo Bernerio, O.P. (22 Aug 1586 - 1605 Resigned)
Sigismondo Donati (7 Jan 1605 - 19 Nov 1641 Died)
Giulio Gabrielli (10 Feb 1642 - 12 Mar 1668 Appointed, Administrator of Rieti)
Filippo de Monti (2 Jun 1670 - 24 Dec 1680 Died)
Giuseppe Sallustio Fadulfi (15 Jan 1685 - 6 Jan 1699 Died)
Giovanni Giuseppe Bonaventura (5 Oct 1699 - Dec 1709 Died)
Giovanni Gambi (10 Mar 1710 - May 1726 Died)
Gregorio Lauri (31 Jul 1726 - 3 Mar 1728 Resigned)
Paolo Tommaso Marana, O.S.B. (8 Mar 1728 - 7 Feb 1755 Died)
Pietro Paolo Leonardi (17 Mar 1755 - 21 Jun 1792 Died)
Giovanni Andrea Archetti (1 Jun 1795 - 5 Nov 1805 Died)
Giovanni Francesco Capelletti (26 Aug 1806 - 9 Dec 1831 Died)
Gregorio Zelli, O.S.B. (2 Jul 1832 - 28 Feb 1855 Died)
Carlo Belgrado (28 Sep 1855 - 25 Jan 1860 Resigned)
Elia Antonio Alberini (Alberani), O.C.D. (23 Mar 1860 - 8 May 1876 Died)
Amilcare Malagola (26 Jun 1876 - 21 Sep 1877 Appointed, Archbishop of Fermo)
Bartolomeo Ortolani (21 Sep 1877 - 6 May 1910 Died)
Apollonio Maggio (13 May 1910 - 22 Oct 1927 Died)
Ludovico Cattaneo, O.Ss.C.A. (6 Jul 1928 - 10 Jul 1936 Died)
Ambrogio Squintani (21 Sep 1936 - 17 Dec 1956 Resigned)
Marcello Morgante (16 Feb 1957 - 13 Apr 1991 Retired)
Pier Luigi Mazzoni (13 Apr 1991 - 12 Feb 1997 Appointed, Archbishop of Gaeta)
Silvano Montevecchi (30 Aug 1997 - 27 Sep 2013 Died)
Giovanni D'Ercole, F.D.P. (12 Apr 2014 - )
