The Mainlinie (German for "Main-line") refers to the historical and political boundary between northern and southern Germany along the

River Main The Main () is the longest tributary of the Rhine, one of the major European rivers. It rises as the White Main in the Fichtel Mountains of northeastern Bavaria and flows west through central Germany for to meet the Rhine below Rüsselsheim, ...

. The line delimitates the spheres of influence of

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

and

Prussia Prussia (; ; Old Prussian: ''Prūsija'') was a Germans, German state centred on the North European Plain that originated from the 1525 secularization of the Prussia (region), Prussian part of the State of the Teutonic Order. For centuries, ...

in the

German Confederation The German Confederation ( ) was an association of 39 predominantly German-speaking sovereign states in Central Europe. It was created by the Congress of Vienna in 1815 as a replacement of the former Holy Roman Empire, which had been dissolved ...

during the 19th century. The seat of the German Confederation,

Frankfurt am Main Frankfurt am Main () is the most populous city in the States of Germany, German state of Hesse. Its 773,068 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located in the forela ...

, sat upon the line.

Geography

Eventually, the Main line became the southern boundary of the

North German Confederation The North German Confederation () was initially a German military alliance established in August 1866 under the leadership of the Kingdom of Prussia, which was transformed in the subsequent year into a confederated state (a ''de facto'' feder ...

. As such, the Main line did not follow the Main River exactly. Rather, the line went east to west: firstly, along the northern border of the

Kingdom of Bavaria The Kingdom of Bavaria ( ; ; spelled ''Baiern'' until 1825) was a German state that succeeded the former Electorate of Bavaria in 1806 and continued to exist until 1918. With the unification of Germany into the German Empire in 1871, the kingd ...

; then, along the river Main to

Mainz Mainz (; #Names and etymology, see below) is the capital and largest city of the German state of Rhineland-Palatinate, and with around 223,000 inhabitants, it is List of cities in Germany by population, Germany's 35th-largest city. It lies in ...

; and finally, along the western border of the

Grand Duchy of Hesse The Grand Duchy of Hesse and by Rhine () was a grand duchy in western Germany that existed from 1806 to 1918. The grand duchy originally formed from the Landgraviate of Hesse-Darmstadt in 1806 as the Grand Duchy of Hesse (). It assumed the name ...

and the Bavarian Palatinate towards the French border. The line split Hesse at Frankfurt am Main, but all of Frankfurt am Main belonged to the North German Confederation. Today, the Main line is viewed as the boundary between northern and southern Germany. Both regions have distinct

linguistic Linguistics is the scientific study of language. The areas of linguistic analysis are syntax (rules governing the structure of sentences), semantics (meaning), Morphology (linguistics), morphology (structure of words), phonetics (speech sounds ...

and

cultural Culture ( ) is a concept that encompasses the social behavior, institutions, and Social norm, norms found in human societies, as well as the knowledge, beliefs, arts, laws, Social norm, customs, capabilities, Attitude (psychology), attitudes ...

differences.

References

19th century in Germany 19th century in Prussia 19th century in Austria German Confederation {{Germany-hist-stub