Chronology of Catholic Dioceses:Slovenia
See a list of abbreviations used in this list. See also our listing of current ecclesial jurisdictions.
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- 400-482
- Sabaria / Szombathely / Steinamager - (Pannonia, Roman Empire; part of Slovenia ) Hungary
- 550~
- Pedena / Petina, Pican – (Venetian Rep., Austria, Italy, Jugoslavia) Croatia
- 550~
- Trieste (Slovenian: Trst) / Tergeste, Tergestum - Italy
- 580-620
- Sabaria / Szombathely / Steinamager - (disappeared during the Great Migrations) - (part of Slovenia ) Hungary
- 0700~
- Salzburg - Austria
- 0798
- Salzburg (Metr.) - Austria
- 1071
- Gurk (detached from Salzburg) - Austria
- 1218
- Seckau (detached from Salzburg) - Austria
- 1787
- Gradisca (new name, See transferred from Trieste, and with territories from the suppressed Gorizia, and Pedena) - Italy
- 1791
- Trieste (reerected, detached from Gradisca) - Italy
- 303
- Ptuj / Poetovio / Pettau (legend: late 2nd Century) - (Noricum Mediterraneum, Roman Empire) Slovenia
- 381
- Emona / Ljubljana / Laibach (legend: late 2nd Century) - (Venetia et Histria, Roman Empire) Slovenia
- 300-400
- Celeia / Celje / Cilli - (Venetia et Histria, Roman Empire) Slovenia
- 580-620
- Aemona, Aemonia, Emona / Ljubljana / Laibach (disappeared during the Great Migrations) - (Byzantine Empire) Slovenia
- 580-620
- Ptuj / Poetovio / Pettau (disappeared during the Great Migrations) - Slovenia
- 580-620
- Celeia / Celje / Cilli (disappeared during the Great Migrations) - Slovenia
- 756 (uncertain 524)
- Koper / Capodistria / Iustinopolis, Capris (Venetia et Histria, Roman Empire, Venice, Austria, Italy) - Slovenia
- 1225 or 1228
- Lavant (detached from Salzburg) - Slovenia / Austria
- 1461
- Ljubljana / Laibach (reestablished, detached from Aquileia) - (Holy Roman Empire) Slovenia
- 1788
- Ljubljana / Laibach (Metr.) - (Holy Roman/German Empire) Slovenia
- 1807
- Ljubljana / Laibach (D, previously Metr.) - (German Empire) Slovenia
- 1828
-
Trieste e Capodistria / Trst i Koper (merged) - (Austria, Italy) - Italy,
Slovenia
(1856-1859 Lavant (see transferred from Sankt Andrä in present-day Austrian territory, to Maribor / Marburg, in present-day Slovenia) - (Austria) Slovenia)
- 1923
- AA of the territories of the D of Szombathély (Prekmurje) and Gurk in Yugoslav territory - (Tugoslavia) Slovenia
- 1947
- AA of the territories of the D of Gorizia in Slovenia (see in Nova Gorica) (from Gorizia) - (Yugoslavia) Slovenia
- 1947
- AA of the territories of the D of Rijeka/Fiume in Slovenia (see in Ljubljana) (from Rijeka/Fiume) - (Yugoslavia) Slovenia
- 1947
- AA of the territories of the D of Trieste-Koper in Slovenia (see in Ljubljana) (From Trieste-Koper) - (Yugoslavia) Slovenia
- 1961
- Ljubljana (AD) - (Yugoslavia) Slovenia
- 1964
- Lavant-Maribor (new name, previously Lavant) - (Yugoslavia) Slovenia
- 1965
- AA of the territories of the D of Gorizia in Slovenia (consolidated in the AA of the Slovene Coast) - (Yugoslavia) Slovenia
- 1965
- AA of the territories of the D of Rijeka/Fiume in Slovenia (consolidated in the AA of the Slovene Coast) - (Yugoslavia) Slovenia
- 1965
- AA of the territories of the D of Trieste-Koper in Slovenia (consolidated in the AA of the Slovene Coast) - (Yugoslavia) Slovenia
- 1965
- AA of the Slovene Coast / Slovensko Primorje (AA for the Slovene territories formerly belonging to the D of Trieste-Koper, Gorizia and Rijeka, incorporating the three AA of 1947) - (Yugoslavia) Slovenia
- 1968
- Ljubljana / Laibach (Metr.) - (Yugoslavia) Slovenia
- 1968
- Maribor (new name, previously Lavant-Maribor) - (Yugoslavia) Slovenia
- 1977
- Koper / Capodistria (detached from Trieste and reestablished, comprising all the territories governed by the AA of the Slovene Coast) - Slovenia
- 2006
- Celje (detached from Maribor) - Slovenia
- 2006
- Murska Sobota (detached from Maribor) - Slovenia
- 2006
- Novo Mesto (detached from Ljubljana) - Slovenia
- 2006
- Maribor (Metr., was part of the Metropolitan Province of Ljubljana) - Slovenia