Treaty of Saint-Omer
The Treaty of Saint-Omer is an agreement concluded on 9 May 1469 between the Duke of Austria Sigismund of Habsburg and the Duke of Burgundy Charles the Bold at Saint-Omer. The treaty provided for the assignment as pledge to the Duke of Burgundy of the Habsburg territories of Upper Alsace, Breisach, the County of Ferrette, the County of Hauenstein, the Lordship of Ortenberg and the four Rhenish towns of Rheinfelden, Säckingen, Laufenburg and Waldshut with their hinterland in the Black Forest. These were to be held by Charles against the payment of a sum of 50,000 florins. 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.