Berg 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).

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 power of Berg grew further in the 14th century. The County of Jülich united with the County of Berg in 1348, and in 1380 the Emperor Wenceslaus elevated the counts of Berg to the rank of dukes, thus originating the Duchy of Jülich-Berg.

In 1509, John III, Duke of Cleves, made a strategic marriage to Maria von Geldern, daughter of William IV, Duke of Jülich-Berg, who became heiress to her father's estates: Jülich, Berg and the County of Ravensberg, which under the Salic laws of the Holy Roman Empire caused the properties to pass to the husband of the female heir (women could not hold property except through a husband or a guardian). With the death of her father in 1511 the Dukes of Jülich-Berg became extinct, and the estate thus came under the rule of John III, Duke of Cleves — along with his personal territories, the County of the Mark and the Duchy of Cleves (Kleve) in a personal union. As a result of this union the dukes of the United Duchies of Jülich-Cleves-Berg controlled much of present-day North Rhine-Westphalia, with the exception of the clerical states of the Archbishop of Cologne and of the Bishop of Münster.

William the Rich was the second duke of the united Julich-Cleves-Berg. He introduced the Gregorian Calendar into the duchies.

However, the new ducal dynasty also became extinct in 1609, when the last duke died insane. This led to a lengthy dispute over succession to the various territories before the partition of 1614: the Count Palatine of Neuburg, who had converted to Catholicism, annexed Jülich and Berg; while Cleves and Mark fell to John Sigismund, Elector of Brandenburg, who subsequently also became Duke of Prussia.

Wolfgang Wilhelm, Count Palatine of Neuburg, became duke. He was a member of the powerful House of Wittelsbach, which ruled Bavaria and the Electoral Palatinate. During his reign, Düsseldorf served as his center of court on occasion.

During the 30 Years' War, even though there were no significant battles around Berg, the territories still had to deal with the stresses of war. At the end of the 30 Years' War, Wolfgang Wilhelm tried to spread Catholicism in the duchies. The Elector of Brandenburg, Frederick Wilhelm, still claimed the Duchy of Berg, and declared war, claiming to be the defender of protestants in Berg. This led to the Düsseldorf Cow War. In the following years however, tension over Berg between Neuburg and Brandenburg greatly decreased.

Upon the extinction of the senior Wittelsbach dynasty ruling the Electorate of the Palatinate in 1685, the Neuburg line inherited the Electorate and generally made Düsseldorf its capital. Elector Charles III Philipp disliked Düsseldorf, because the estates there did not want to grant the funds he demanded. As such, he moved his capital from Düsseldorf to Mannheim, where it remained until the Elector Palatine, Charles Theodore, inherited the Electorate of Bavaria in 1777.

The French occupation (1794–1801) and annexation (1801) of Jülich (French: Juliers) during the French revolutionary wars separated the two duchies of Jülich and Berg, and in 1803 Berg separated from the other Bavarian territories and came under the rule of a junior branch of the Wittelsbachs. In 1806, in the reorganization of the German lands occasioned by the end of the Holy Roman Empire, Berg became the Grand Duchy of Berg, under the rule of Napoleon's brother-in-law, Joachim Murat. Murat's arms combined the red lion of Berg with the arms of the duchy of Cleves. The anchor and the batons came to the party due to Murat's positions as Grand Admiral and as Marshal of the Empire. As the husband of Napoleon's sister Caroline Bonaparte, Murat also had the right to use the imperial eagle.

In 1809, one year after Murat's promotion from Grand Duke of Berg to King of Naples, Napoleon's young nephew, Prince Napoleon Louis Bonaparte (1804–1831, elder son of Napoleon's brother Louis Bonaparte, King of Holland) became the Grand Duke of Berg; French bureaucrats administered the territory in the name of the child. The Grand Duchy's short existence came to an end with Napoleon's defeat in 1813 and the peace settlements that followed.

In 1815, after the Congress of Vienna, Berg became part of a province of the Kingdom of Prussia: the Province of Jülich-Cleves-Berg. In 1822 this province united with the Grand Duchy of the Lower Rhine to form the Rhine Province.

• Hermann I "Pusillus", Count Palatine of Lotharingia
• Adolf I of Lotharingia, Vogt of Deutz
• Adolf II of Lotharingia, Vogt of Deutz

• 1077–1082 Adolf I of Berg, 1st Count of Berg
• 1082–1093 Adolf II of Berg-Hövel (Huvili), Count of Berg
• 1093–1132 Adolf III, Count of Berg
• 1132–1160 Adolf IV, Count of Berg
  • c.1140-1148 Adolf V, Count of Berg
• 1160–1189 Engelbert I, Count of Berg
• 1189–1218 Adolf VI, Count of Berg
• 1218–1225 Engelbert II of Berg, Archbishop of Cologne, Regent of Berg
• 1218–1248 Irmgard, heiress of Berg, marries in 1217 Henry IV, Duke of Limburg

• 1218–1247 Henry IV Duke of Limburg, Count of Berg
• 1247–1259 Adolf VII Count of Limburg, Count of Berg
• 1259–1296 Adolf VIII
• 1296–1308 William I
• 1308–1348 Adolf IX

– in union with Ravensberg –

• 1348–1360 Gerhard
• 1360–1380 Wilhelm II; became duke in 1380

– in union with Ravensberg (except 1404–1437) and after 1423 in union with the duchy of Jülich –

• 1380–1408 William I
• 1408–1437 Adolf
• 1437–1475 Gerhard
• 1475–1511 Wilhelm II

– from 1521 a part of the United Duchies of Jülich-Cleves-Berg–

• 1511–1539 Johann
• 1539–1592 William III
• 1592–1609 Johann Wilhelm I

– in union with Jülich und Palatinate-Neuburg, from 1690 also with the Electorate of the Palatinate, from 1777 also with Bavaria–

• 1614–1653 Wolfgang Wilhelm
• 1653–1679 Phillip Wilhelm
• 1679–1716 Johann Wilhelm II
• 1716–1742 Karl Phillip
• 1742–1799 Karl Theodor
• 1799–1806 Maximilian Josef
  • 1803–1806 William of Palatinate-Zweibrücken-Birkenfeld-Gelnhausen, Duke in Bavaria (administrator)

• 1806–1808 Joachim Murat
• 1808–1809 Napoléon Bonaparte
• 1809–1813 Napoléon Louis Bonaparte (under the regency of Napoléon Bonaparte)

The historic coat of arms of Berg shows a red lion with a double tail and blue crown, tongue, and claws – blazoned as: Argent a lion rampant gules, queue fourchée crossed in saltire, armed, langued, and crowned azure. This lion originates from the arms of the Duke of Limburg as the Berg title in the 13th century fell to the Limburg line.

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  Heraldic shield of arms

• List of consorts of Berg
• Aachen fine cloth

• Media related to Duchy of Berg at Wikimedia Commons
• Lwl.org: Edicts of Jülich, Cleves, Berg, Grand Duchy Berg, 1475–1815 (Coll. Scotti)
• Hoeckmann.de: Historical Map of Northrhine-Westphalia in 1789

51°12′26″N 6°48′45″E / 51.20722°N 6.81250°E / 51.20722; 6.81250