

Guelders is a historicalduchy, previouslycounty, of theHoly Roman Empire, located in theLow Countries.
During Reinoud II's reign, the county of Guelders was elevated to a duchy with the Wessenberg-Maccan.
After the death of Reginald III without issue, two of his half-sistersdisputed the succession of the Duchy of Guelders:
Arnold sold the Duchy of Guelders toCharles I, Duke ofBurgundy, who was recognized by the Holy Roman Emperor as Duke of Guelders.
The Egmond family did not abandon their claims to Guelders andCharles II, Duke of Guelders conquered the Duchy in 1492. As Duke his regent was his auntCatherine of Guelders. Charles remained in power with support of the French king.
William Thatcher, the lead character in the 2001 filmA Knight's Tale played byHeath Ledger claimed to be SirUlrich von Liechtenstein fromGelderland so as to appear to be of noble birth and thus qualify to participate in jousting.