Lorraine is a cultural and historical region in Northeastern France, now located in the administrative region of Grand Est. Its name stems from the medieval kingdom of Lotharingia, which in turn was named after either Emperor Lothair I or King Lothair II. Lorraine later was ruled as the Duchy of Lorraine before the Kingdom of France annexed it in 1766.
From 1982 until January 2016, Lorraine was an administrative region of France. In 2016, under a reorganisation, it became part of the new region Grand Est. As a region in modern France, Lorraine consisted of the four departments Meurthe-et-Moselle, Meuse, Moselle and Vosges (from a historical point of view the Haute-Marne department is located in the region), containing 2,337 communes. Metz is the regional prefecture. The largest metropolitan area of Lorraine is Nancy, which had developed for centuries as the seat of the duchy.
Lorraine borders Germany, Belgium, and Luxembourg. Its inhabitants are called Lorrains and Lorraines in French and number about 2,356,000.
Lorraine's borders have changed often in its long history. The location of Lorraine led to it being a paramount strategic asset as the crossroads of four nations. This, along with its political alliances, marriage alliances, and the ability of rulers over the centuries to choose sides between East and West, gave it a tremendously powerful and important role in transforming all of European history. Its rulers intermarried with royal families over all of Europe, played kingmaker, and seated rulers on the thrones of the Holy Roman Empire and the Austro-Hungarian Empire, and others.
In 840, Charlemagne's son Louis the Pious died. The Carolingian Empire was divided among Louis' three sons by the Treaty of Verdun of 843. The middle realm, known as Middle Francia, went to Lothair I, reaching from Frisia in Northern Germany through the Low Countries, Eastern France, Burgundy, Provence, Northern Italy, and down to Rome. On the death of Lothair I, Middle Francia was divided in three by the Treaty of Prüm in 855, with the northern third called Lotharingia and going to Lothair II.