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List of bishops of the Roman Catholic Diocese of Sion :
Bishops of Agaunum (Octodurum)
From
To
Bishop
Notes
fl. 380s
Theodore
fl. 440
Salvius/Silvius
fl. 490
Prothais
516(?)
Theodore II (?)
517
Constantinus
549
Rufus
565
Agricola
From
To
Bishop
Notes
585
Heliodorus
613
614
Leudemond
647
653
Prothais
673
690
Saint Aimé
762
765
Willicar
786/8
796/8
Altheus
fl. 805
Theodore III (?)
According to 12th-century legend, secular power was granted to the bishops of Sion by Charlemagne
fl. 824
Adalongus
825
857
Heyminus
877
899/900
Waltherius
932
Asmundus
fl. 940
Manfredus (?)
983
984/5
Amizo
Prince-bishops of Sion [ edit ]
From
To
Bishop
Notes
993/4
1018/20
Hugues
First prince-bishop, granted secular power by Rudolph III of Burgundy in c. 999
1034
1053/4
Aymon of Savoy
Succeeded his brother Buchardus as Abbot of St Maurice in 1049 or 1050
1054
1087-1090
Ermenfroi
fl. 1092
Gausbertus
1107
1116
Vilencus
1135
1138
Boson
1138
1150
Saint Guérin
1150
1162(?)
Louis
1162
1168 (?)
Amédée of La Tour
1176
1177
Guillaume of Blonay
1179
1181 or 1184
Conon
1184(?)
1196
Guillaume of Candie
1196
1203
Nantelme of Écublens
1203
1205
Guillaume of Saillon
1206
1237
Landry of Mont
1237
1243
Boson II of Granges
1243
1271
Henri of Rarogne
1271
1273
Rodolphe of Valpelline
1273
1287
Pierre of Oron
February 1287
15 December 1289
vacant
1289
1308
Boniface of Challant
1308
1323
Aymon of Châtillon
1323
1338
Aymon of La Tour
1338
1342
Philippe of Chamberlhac
1342
1375
Guichard Tavelli
Murdered by defenestration
1375
1386
Édouard of Savoy
loyal to Avignon
From
To
Bishop
Notes
1386
1386
Guillaume of La Baume-Saint-Amourb
1387
1387
Robert Chambrier
1388
1392
Humbert de Billens
1398
1404
Aymon Séchala
1404
1417
Jacques (Antoine?) de Challant
loyal to Rome
From
To
Bishop
Notes
1387
1388
Gerardus (Girard Tavel?)
1392
1393
Henri de Blanchis
1394
1402
Guillaume IV ("the Good") of Rarogne
1402
1418
Guillaume V of Rarogne
see Raron affair
Renaissance to early modern [ edit ] Coat of arms of Hildebrand of Riedmatten (1594). The prince-bishops used their family coats of arms; the Riedmatten coat of arms was in use for much of the early modern period (1529–1545, 1565–1613, 1640–1701) and is presented as coat of arms of the bishopric in e.g. Siebmacher (1605) .
From
To
Bishop
Notes
1418
1437
André dei Benzi of Gualdo
Archbishop of Kolocza (in Hungary); administrator from 1418, bishop from 1431. Valais witch trials .
1437
1451
Guillaume VI of Rarogne
1451
1457
Henri Asperlin
1457
1482
Walter Supersaxo
Burgundian War
1482
1496
Jost of Silenen (d. 1498)
Member of Lucerne nobility (uncle of Kaspar von Silenen ) and diplomat for the Swiss Confederacy, bishop of Grenoble 1477–1467, Jost ruled as a "Renaissance prince" but after failed campaigns against Milan was forced to abdicate and went into exile in Lyon, retaining only the title of titular bishop of Hierapolis .
1496
1499
Nicolas Schiner
1499
1522
Mathieu Schiner
Cardinal; nephew of Nicolas Schiner
1522
1528
Philippe am Hengart (not recognised by the Pope)Philippe de Platea (not recognised locally)
1529
1545
Adrien I of Riedmatten
Valais becomes an eternal associate of the Old Swiss Confederacy in 1529.
1548
1565
Jean Jordan
1565
1604
Hildebrand I of Riedmatten
Banned protestantism in 1604[ 1]
1604
1613
Adrien II of Riedmatten
1613
1638
Hildebrand II Jost
In 1628, the Valais becomes a republic, but remains under the nominal rule of the prince-bishops.
1638
1640
Barthélemy Supersaxo
1640
1646
Adrien III of Riedmatten
1646
1672
Adrien IV of Riedmatten
1672
1701
Adrien V of Riedmatten
1701
1734
François-Joseph Supersaxo
1734
1752
Jean-Joseph-Arnold Blatter
1752
1760
Jean-Hildebrand Roten
1760
1780
François-Joseph-Frédéric Ambuel
1780
1790
François-Melchior-Joseph Zen-Ruffinen
1790
1807
Joseph Anton Blatter
Last prince-bishop, loss of secular power with the French invasion of 1798.
Modern coat of arms[citation needed
From
To
Bishop
Notes
1807
1817
Joseph-François-Xavier de Preux
1817
1829
Auguste-Sulpice Zen-Ruffinen
1830
1843
Maurice-Fabien Roten
1843
1875
Pierre-Joseph de Preux
1875
1901
Adrien VI Jardinier
1901
11 July 1918
Jules-Maurice Abbet
Born 11 September 1845
1919
19 March 1952
Victor Bieler
Born 16 March 1881
1952
1975
François-Nestor Adam
Born 7 February 1903; died 8 February 1990
1975
1995
Henri Schwery
Born 14 June 1932
1995
2014
Norbert Brunner
Born 21 June 1942
2014
Jean-Marie Lovey
Born 2 August 1950
