In the Treaty of Saint-Omer, Archduke Sigismund of Habsburg mortgaged the

County of Ferrette The County of Ferrette (or Pfirt) was a feudal jurisdiction in Alsace in the Middle Ages and the early modern period. It roughly corresponds with the Sundgau and comprised the lordships of Ferrette (Pfirt), Altkirch, Thann, Belfort, Rougemo ...

along with the

Landgraviate Landgrave (german: Landgraf, nl, landgraaf, sv, lantgreve, french: landgrave; la, comes magnus, ', ', ', ', ') was a noble title used in the Holy Roman Empire, and later on in its former territories. The German titles of ', ' ("margrave"), a ...

Upper Alsace Upper Alsace (southern Alsace) was a landgraviate of the Holy Roman Empire centred on Ensisheim and Landser, north of the County of Ferrette (Pfirt). The counts of Habsburg ruled the territory from the 1130s down to its cession to France in the ...

to Duke

Charles the Bold Charles I (Charles Martin; german: Karl Martin; nl, Karel Maarten; 10 November 1433 – 5 January 1477), nicknamed the Bold (German: ''der Kühne''; Dutch: ''de Stoute''; french: le Téméraire), was Duke of Burgundy from 1467 to 1477. ...

, in

Saint-Omer (Pas-de-Calais) Saint-Omer (; vls, Sint-Omaars) is a commune and sub-prefecture of the Pas-de-Calais department in France. It is west-northwest of Lille on the railway to Calais, and is located in the Artois province. The town is named after Saint Audomar, ...

on 9 May 1469. The treaty laid the foundation for the

Burgundian Wars The Burgundian Wars (1474–1477) were a conflict between the Burgundian State and the Old Swiss Confederacy and its allies. Open war broke out in 1474, and the Duke of Burgundy, Charles the Bold, was defeated three times on the battlefield in th ...

Historical context

Sigismund had been looking for some time for an ally capable of helping him to control the expansionist aims of the Swiss Confederates, carried out for the moment at the expense of his territories. Having sought the support of King

Louis XI Louis XI (3 July 1423 – 30 August 1483), called "Louis the Prudent" (french: le Prudent), was King of France from 1461 to 1483. He succeeded his father, Charles VII. Louis entered into open rebellion against his father in a short-lived revol ...

and having suffered a shrewd refusal on his part, he turned to his rival, Charles the Bold. The treaty mortgaged the

Habsburg The House of Habsburg (), alternatively spelled Hapsburg in Englishgerman: Haus Habsburg, ; es, Casa de Habsburgo; hu, Habsburg család, it, Casa di Asburgo, nl, Huis van Habsburg, pl, dom Habsburgów, pt, Casa de Habsburgo, la, Domus Hab ...

territories of

Breisach Breisach (formerly Altbreisach; Low Alemannic: ''Alt-Brisach'') is a town with approximately 16,500 inhabitants, situated along the Rhine in the Rhine Valley, in the district Breisgau-Hochschwarzwald, Baden-Württemberg, Germany, about halfway b ...

, the County of Ferrette, the County of

Hauenstein Hauenstein is a municipality in the Südwestpfalz district, in Rhineland-Palatinate, Germany. It is situated in the Palatinate forest, approximately 20 km east of Pirmasens, and 20 km west of Landau. Hauenstein is the seat of the ''Ver ...

, the Lordship of Ortenberg and the four

Rhenish The Rhineland (german: Rheinland; french: Rhénanie; nl, Rijnland; ksh, Rhingland; Latinised name: ''Rhenania'') is a loosely defined area of Western Germany along the Rhine, chiefly its middle section. Term Historically, the Rhinelands ...

towns of Rheinfelden, Säckingen, Laufenburg and Waldshut with their hinterland in the

Black Forest The Black Forest (german: Schwarzwald ) is a large forested mountain range in the state of Baden-Württemberg in southwest Germany, bounded by the Rhine Valley to the west and south and close to the borders with France and Switzerland. It is t ...

to the Duke of Burgundy. These were to be held by Charles against the payment of a sum of 50,000

florin The Florentine florin was a gold coin struck from 1252 to 1533 with no significant change in its design or metal content standard during that time. It had 54 grains (3.499 grams, 0.113 troy ounce) of nominally pure or 'fine' gold with a purcha ...

s. The treaty also provided for a defensive alliance.Richard Vaughan, ''Charles the Bold: The Last Valois Duke of Burgundy'' (Boydell, 1973), pp. 86–89, 261.

Consequences of the Treaty of Saint-Omer

The treaty gave Burgundy access to the Rhine and made Charles the Bold, an immediate neighbour of the Swiss. The management of these territories by the representative of the Duke of Burgundy, the

bailiff A bailiff (from Middle English baillif, Old French ''baillis'', ''bail'' "custody") is a manager, overseer or custodian – a legal officer to whom some degree of authority or jurisdiction is given. Bailiffs are of various kinds and their offi ...

Peter von Hagenbach Peter von Hagenbach (c. 1420 – May 9, 1474), also Pierre de Hagenbach, Pietro di Hagenbach, Pierre d'Archambaud, or Pierre d'Aquenbacq, was a Burgundian knight from Alsace, German military and civil commander and convicted war criminal. Biogr ...

, the economic consequences and the loss of the privileges which resulted from it for the Alsatian cities and the Swiss allied cities, seeded a revolt in the territories of

Upper Rhine The Upper Rhine (german: Oberrhein ; french: Rhin Supérieur) is the section of the Rhine between Basel in Switzerland and Bingen in Germany, surrounded by the Upper Rhine Plain. The river is marked by Rhine-kilometres 170 to 529 (the sc ...

. On the other hand, Louis XI never ceased plotting against his rival, Charles the Bold, and in time he skillfully rallied to his cause and against the Duke the Alsatian towns, the Confederates and

René II, Duke of Lorraine René II (2 May 1451 – 10 December 1508) was Count of Vaudémont from 1470, Duke of Lorraine from 1473, and Duke of Bar from 1483 to 1508. He claimed the crown of the Kingdom of Naples and the County of Provence as the Duke of Calabria 1480& ...

. This permanent state of military confrontation led to the

Battle of Héricourt The Battle of Héricourt was fought on 13 November 1474 near Héricourt, Burgundy, as part of the Burgundian Wars. It resulted in victory for the Swiss Confederacy and its allies over the Burgundian State. The battle The Swiss and their allies ...

on 13 November 1474, the first major defeat for the troops of Charles the Bold, a defeat that marked the beginning of the end for the Duke himself and the disappearance of the

Duchy of Burgundy The Duchy of Burgundy (; la, Ducatus Burgundiae; french: Duché de Bourgogne, ) emerged in the 9th century as one of the successors of the ancient Kingdom of the Burgundians, which after its conquest in 532 had formed a constituent part of the ...

in favour of the King of France, Louis XI. (see Treaty of Arras)

Notes

{{Use dmy dates, date=May 2020 1474 in Europe 1470s in the Holy Roman Empire Treaties of the Habsburg monarchy