The family first appears as free lords about 1200, named after the Toggenburg castle near Fischingen in the hills between the Thur and the Murg.
They share in the inheritance of Alt-Rapperswil and other houses, hold the advocacies of the monasteries of St Johann in the Thur valley, Fischingen and Embrach, and are pressed on all sides by St Gall, the bishop of Constance and the Kyburgs. The count's title comes in 1209.
Who he is
- Name
- Diethelm of Toggenburg (mentioned about 1176 to 1205/07)
- Title
- Free lord (Edelfreier) of Toggenburg; counts only from 1209
- Since
- not pinned
- Born
- not pinned
- Family
- A second Diethelm (mentioned about 1210 to 1230), perhaps his son, married Guta, possibly of Rapperswil; the brothers Diethelm and Friedrich of the next generation (Friedrich killed by Diethelm in 1226). HLS calls the early genealogy unclear.
- Confidence
- medium
HLS Toggenburg; de.wikipedia Toggenburger.
Overlord
The king; the abbey of St Gall and the bishop of Constance for fiefs.
What it holds
- Alt-Toggenburg castle (the later St Iddaburg) above Fischingen
- The Thur valley (Toggenburg) round Lütisburg, Bütschwil and Wattwil; Neu-Toggenburg castle, built late in the 12th century
- Wil, a Toggenburg place (lost to St Gall in 1226); whether a town by 1200 is not pinned
- Advocacies of St Johann im Thurtal, Fischingen and Embrach (lost 1228-1299)
- Estates in the Zürcher Oberland; a share of the Alt-Rapperswil inheritance
How it was acquired
Inheritance; the Rapperswil share about 1200.
Allies and rivals
Kin of Rapperswil. Rivals: the abbey of St Gall, the bishop of Constance, the Kyburgs.
How things stand that morning
Holds the Toggenburg; allegiance in the throne war not pinned.
Wealth
Upland farms and cattle of the Thur valley; advocacy dues. No figures.
Military
Alt-Toggenburg, Neu-Toggenburg. No numbers.
Threats
- St Gall's claims on Wil and the lower valley.
- Kyburg pressure in the Thurgau.
Places of note
- Alt-Toggenburg castle: Seat
Where the sources disagree
Evidence: HLS marks the dates of the first Diethelm as uncertain.
On the map: The upper valley above Wattwil belonged largely to St Johann abbey, under their advocacy; drawn with the rest.
Primary sources for Empire
Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.
- Annals of Marbach (compiled to 1238, the section on 1198 to 1210 written in the early 13th century). Alsatian annals on the Staufen side of the Upper Rhine. Read online
- Annals of Reiner of Saint James, Liège, Reiner of Liège (1197 to 1230, kept year by year). Contemporary annals kept inside Liège. Read online
- Chronicle of Burchard of Ursberg, Burchard of Ursberg (about 1229 to 1230, reworked by Conrad of Lichtenau). Written a generation later by a fierce partisan of the Staufen and a critic of Innocent III. Read online
- Chronicle of Otto of St Blasien, Otto of St Blasien (about 1209 to 1210). A Swabian continuation of Otto of Freising written from the Staufen side. Read online
- Chronicle of Reinhardsbrunn; Chronicle of St Peter's, Erfurt (Erfurt chronicle in the 13th century; Reinhardsbrunn compilation about 1340 to 1349 from older annals). The two Thuringian chronicles. Read online
- Chronicle of the Slavs, by Arnold of Lübeck, Arnold of Lübeck (about 1209 to 1210). Arnold continues Helmold and writes from Lübeck, close to Danish, Welf and Baltic affairs. Read online
- Royal Chronicle of Cologne (in stages from about 1175 to about 1250; the section on 1198 to 1220 written soon after the events). The fullest German narrative of the throne war from the Welf and Cologne side. Read online
- Chronicle of Hainaut, Gislebert of Mons (about 1195 to 1196). Ends in 1195, so it has no 1200 entries, but it is the indispensable background for Flanders and Hainaut: the career of Count Baldwin V of Hainaut (VIII of Flanders), his union of the two counties, the settlement with Philip over Artois, the rights, castles, fiefs and vassals of Hainaut listed by a man who ran its chancery, and the youth of Baldwin IX, who held both counties in 1200. Read online
8 more in the sources library for The Rhineland, the Low Countries and the Swiss Lands.
Sources and studies
Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.