The term Low Countries, also known as the Low Lands and historically called the Netherlands, Flanders, or Belgica, refers to a coastal lowland region in northwestern Europe forming the lower basin of the Rhine–Meuse–Scheldt delta and consisting of Belgium, the Netherlands, and Luxembourg. Geographically and historically, the area includes also parts of France and Germany such as the French Flanders and the German regions of East Frisia and Cleves. During the Middle Ages, the Low Countries were divided in numerous semi-independent principalities.
Historically, the regions without access to the sea have linked themselves politically and economically to those with access to form various unions of ports and hinterland, stretching inland as far as parts of the German Rhineland. That is why nowadays some parts of the Low Countries are actually hilly, like Luxembourg and the south of Belgium. Within the European Union, the region's political grouping is still referred to as the Benelux.
During the Roman empire the region contained a militarised frontier and contact point between Rome and Germanic tribes.