It stems from Alsace-Lorraine, an administrative region of northeastern France...

...on the west bank of the upper Rhine, next to Germany and Switzerland. In January 2021, it had a population of 1,919,745. Alsatian culture is characterized by a blend of German and French influences.

From 1982 to 2016, Alsace was the smallest administrative région in metropolitan France, consisting of the Bas-Rhin and Haut-Rhin departments. Since World War II most Alsatians primarily speak French.

Alsace was part of the Holy Roman Empire of the German Nation, but after defeat in the Thirty Years' War it was annexed by France in the 17th century. In 1871, it became part of the newly founded German Empire, forming part of Alsace-Lorraine. Alsace was returned to France in 1919, but was reincorporated into Germany in 1940. After 1944 it again became French.

Source: Wiki