Sitten
A Bishopric established c. 775, and located in southwest Switzerland. From 999 the Bishops were also Counts of Valais, and as such held temporal authority over that region until the Napoleonic era. Switzerland was detached completely from the Empire by 1648, but I include all the Counts here regardless.
Hugo............................................fl. c. 1000
Eberhard of Burgundy........................c. 1000-c. 1035
Aimone II Di Savoy.............................c. 1035-1053
Hermanfried....................................1053-c. 1086
Gosbert.........................................fl. c. 1090
Udo.............................................fl. c. 1100
Villencus III...............................c. 1106-c. 1122
Edmund......................................c. 1122-c. 1125
Boso I......................................c. 1125-c. 1138
Warin..........................................c. 1138-1150
Louis.............................................1151-1157
Amadeus I von Thun.............................1157-c. 1170
Kuno........................................c. 1170-c. 1187
Guillaume I....................................1188-c. 1194
Nanthelm de Ecublens...........................c. 1196-1198
vacant...........................................
Guillaume II De Sallons.....................c. 1203-c. 1205
Landric de Mont................................c. 1206-1237
Boso II des Grandes...............................1237-1243
Henri I de Rarogne................................1243-1271
Raoul de Val-Pellina..............................1271-1273
Peter von Ehringen................................1273-1287
vacant...........................................
Boniface de Challant..............................1290-1308
Aimone III de Chatillon...........................1308-1323
Aimone IV von Thurn...............................1323-1338
Philibert de Gastons..............................1338-1342
Guiscard Tavel....................................1342-1375
Edward di Savoy-Achaia............................1375-1386
Guillaume III de la Beaume........................1386-1387
Humbert de Billens................................1387-1392
Henri II des Blanches de Vellate..................1392-1393
Guillaume IV de Rarogne...........................1393-1402
Guillaume V de Rarogne............................1402-1417
Andreas di Gualdo.................................1418-1437
Guillaume VI de Rarogne...........................1437-1451
Guillaume VII de Etaine...........................1451-1454
Heinrich III von Asperling........................1454-1457
Walther II Supersaxo von der Fluhe................1457-1482
Jobst von Spilinon................................1482-1496
Nicolas Scheiner..................................1496-1499
Matthias Scheiner.................................1499-1522
Philipp Platten...................................1522-1529
Adrian I Riedmatten...............................1529-1548
Johann Jordan.....................................1548-1565
Hildebrand I Riedmatten...........................1565-1604
Adrian II Riedmatten..............................1604-1613
Hildebrand II Jost................................1613-1638
Bartholomeu Supersaxo von der Fluhe...............1638-1640
Adrian III Riedmatten.............................1640-1646
Adrian IV Riedmatten..............................1646-1672
Adrian V Riedmatten...............................1672-1701
Franz Josef Supersaxo von der Fluhe...............1701-1734
Johann Jakob Blatter..............................1734-1752
Johann Hildebrand Roten...........................1752-1760
Franz Friedrich Am Buel...........................1760-1780
Franz Melchior Zen Ruffinen.......................1780-1790
Josef Anton Blatterer.............................1790-1798
To the Helvetican Republic........................1798-1802
Rhodanic Republic.................................1802-1810
To France.........................................1810-1815
To Switzerland as the Canton of Valais............1815-