Arcadiopolis in Asia was an Ancient city and bishopric in Asia Minor and is now a Latin Latin Catholic titular see.
Its modern location is Thira in modern Asian Turkey (not its Greek namesake, Santorini island).
Arcadiopolis was important enough in the Late Roman province of Asia Prima to become a suffragan of its capital Ephesus' Metropolitan Archbishopric, but was to fade.
The diocese was nominally restored in the 17th century as a Lati Catholic titular bishopric, called just Arcadiopolis. It was renamed Arcadiopolis in Asia in 1933, avoiding confusion with Arcadiopolis in Europe.
It is vacant since decades, having had the following incumbents, all of the lowest (episcopal) rank :
Guillaume de Gifford (1617.10.22 – 1622.12.05) (later Archbishop)
Miguel Pérez Cevallos (1660.01.21 – 1681.10.02)
Friedrich Karl Reichsgraf von Schönborn (1710.05.19 – 1729.01.30)
Julius Nicolaus Torno (1744.12.07 – 1756)
Giovanni Pietro Galletti, Benedictine Order (O.S.B.) (1763.08.22 – 1775.11.12)
Mateusz Maurycy Wojakowski (1824.12.24 – 1845.02.07)
Vincent Spaccapietra, Lazarists (C.M.) (1852.11.21 – 1855.04.18) (later Archbishop)
Henri-Marie Amanton, Dominican Order (O.P.) (1857.03.10 – 1865.03.11) (later Archbishop)
James Lynch, C.M. (1866.08.31 – 1888.03.05)
William Gordon (1889.12.28 – 1890.06.16)
Emilio Alfonso Todisco Grande (1892.07.11 – 1893.06.12)
Theophilus Mayer, Mill Hill Missionaries (M.H.M.) (1894.07.31 – 1900.09.09)
Célestin-Henri Joussard, Oblates of Mary Immaculate (O.M.I.) (1909.05.11 – 1932.09.20)
Basil Harry Losten (1971.03.15 – 1977.09.20)
