The Duchy of Lower Lotharingia, also called Northern Lotharingia, LowerLorraine or Northern Lorraine (and also referred to as Lothier or Lottier in titles)
historically also known as the Netherlands (Dutch: de Nederlanden), is a coastal lowland region in Northwestern Europe forming the lower basin of the Rhine–Meuse–Scheldt
Carolingian Empire. It comprised present-day Lorraine (France), Luxembourg, Saarland (Germany), Netherlands, most of Belgium, and Germany west of the Rhine