Duchy of Berg
former German state and dukedom
The Duchy of Berg (German: Herzogtum Berg [bɛʁk] ) was a state—originally a county, later a duchy—in the Rhineland of Germany. Its capital was Düsseldorf. It existed as a distinct political entity from the early 12th to the 19th centuries. It was a member state of the Holy Roman Empire.
The name of the county lives on in the modern geographic term Bergisches Land, often misunderstood as bergiges Land (hilly country).
History
Ascent
The Counts of Berg emerged in 1101 as a junior line of the dynasty of the Ezzonen, which traced its roots back to the 9th-century Kingdom of Lotharingia, and in the 11th century became the most powerful dynasty in the region of the lower Rhine.
In 1160, the territory split into two portions, one of them later becoming the County of the Mark, which returned to the possession of the family line in the 16th century. The most powerful of the early rulers of Berg, Engelbert II of Berg died in an assassination on November 7, 1225. In 1280 the counts moved their court from Schloss Burg on the Wupper river to the town of Düsseldorf. Count Adolf VIII of Berg fought on the winning side in the Battle of Worringen against Guelders in 1288.
The public source identifies “Duchy of Berg” as former German state and dukedom. This brief keeps that definition visible, then builds a research path around Duchy, Berg and former.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Mar 18, 2026. The linked authority identifier is Q151095. Authority coordinates are 51.207, 6.813. 1 of 2 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1101, 1160, 1225 and 1280.
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This entry incorporates text from “Duchy of Berg” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.