County of Loon
During the 19th and 20th centuries, it became increasingly common to refer more specifically to the Dutch-speaking part of Belgium as "Flanders". The linguistic limit between French and Dutch was recorded in the early '60s, from Kortrijk to Maastricht. Now, Flanders extends over the northern part of Belgium, including not the Dutch-speaking Belgian parts of the medieval Duchy of Brabant, which was united with Flanders since the Middle Ages, but also Belgian Limburg, which corresponds closely to the medieval County of Loon, which was never under Burgundian control.