Eilenburg Castle was first mentioned on 29 July 961 in a document by
Otto I. as
civitas Ilburg. The name has Slavic origin and means
town with clay deposits. A settlement of tradespeople probably developed from the 11th century in the vicinity of the castle. The town was incorporated in the
Margravate of Meissen in 1386. In the 16th century Eilenburg was central to several events of the
Protestant Reformation. Even
George, Duke of Saxony, called this town a
noteworthy place ("namhaftigen Ort").
Martin Luther was in Eilenburg seven times and called it a
blessed lard pit ("gesegnete Schmalzgrube"). The
Thirty Years' War left its mark on Eilenburg. The town was initially spared fighting, but it suffered from the catastrophic economic effects of the war. From 1631 the town was directly involved in the war. In 1632 the body of King
Gustavus Adolphus of Sweden was laid out in the Red Deer Inn ("Gasthof Roter Hirsch") after he had been killed in the
Battle of Lützen (1632). In 1639 Eilenburg was conquered by the troops of
Georg von Derfflinger. In 1646 peace negotiations between Saxony and Sweden began in Eilenburg to extend the expiring Armistice of Kötzschenbroda. On 14 September 1648 the Treaty of Eilenburg was signed and meant the end of the Thirty Years' War for Saxony, and as a consequence the town recovered. The slow onset of economic recovery came to a sudden end with the start of the
Seven Years' War. Virtually each male in Eilenburg had to serve in the armed forces. The city was occupied alternately by the
Austrian Empire and the
Kingdom of Prussia. In the following years Eilenburg turned into an impoverished and dirty old town. At the end of the 18th century, the economy stagnated and Eilenburg became an even more insignificant town. In 1813 during the
War of the Sixth Coalition shortly before the
Battle of Leipzig,
Napoleon took a last view of his and his allies' Saxon troops in eastern Eilenburg. After Napoleon's defeat, Saxony had to cede large territory to
Prussia under the provisions of the
Congress of Vienna. Eilenburg was part of the
Province of Saxony within the progressive Prussian state. Thereby the transition of Eilenburg to an industrial city was advanced significantly. Because of the founding of numerous textile factories, Eilenburg, with its proximity to the Prussian capital
Berlin, became an important centre of Prussian textile production. The ascent to an important industrial city came mainly from the nearby
Kingdom of Saxony. Saxon industrialists settled in Eilenburg for having duty-free access to the Prussian market. The onset of
urbanization caused a rapid increase in population. The social tensions resulting from the industrialization and the huge growth of population triggered a strong
labour movement. In 1849 the Health Insurance Support Association ("Krankenkassenunterstützungsverein") was founded. In 1850 the Food Association of Eilenburg ("Eilenburger Lebensmittelassociation") as the first food
cooperative of Germany and "Darlehnskassenverein" as the first
credit union in Germany were founded.
Carl Degenkolb, owner of a factory in Eilenburg and member of the
Frankfurt Parliament, voluntarily instituted the first German
works councils at his factory. On 30 June 1872
Eilenburg station was opened with the
Halle-Eilenburg-Falkenberg route. Two years later, transport services started on the newly built
Leipzig–Eilenburg railway. Industrial development continued rapidly with development of the chemical, wood and metal processing industries. The German Celluloid Factory ("Deutsche Celluliod-Fabrik") founded in 1887 characterized the city's business for more than a hundred years. During
World War I hundreds of Eilenburg people were called up for military service. On 21 October 1917
Wilhelm Pieck, later a President of the
German Democratic Republic, escaped from a military transport at Eilenburg station. A total of about 800 people from Eilenburg were killed during the war. About two weeks before the end of the
World War II the city was almost completely destroyed. On 17 April 1945
American troops reached Eilenburg, which German defenses were ordered to hold. For three days and three nights the town was under heavy artillery fire, which destroyed most of the buildings of the city. Two hundred people were killed and 90 percent of the town centre and 65 percent of the buildings of the whole town were destroyed; the American army had nearly no losses. Eilenburg was one of the most heavily damaged cities in Germany. The town centre was rebuilt in the 1950s. In 1952 the city became the seat of the
Eilenburg District in
Bezirk Leipzig, newly formed by the administrative reform in
East Germany. In the eastern part of Eilenburg large new housing areas were built. In autumn 1989 up to seven thousand inhabitants formed peaceful demonstrations demanding a change ("Wende") especially on the political level. After
German reunification some long-established state socialist companies went out of business. Dismantling of jobs could only be partially offset by new business settlements on newly created industrial areas outside the town. In 1994 Eilenburg District was annexed by
Delitzsch District in the course of district reform. In 2002 Eilenburg was hit hard by flood of the river
Mulde. The damages amounted to €135 million. The construction of flood protection facilities was intensified after the flood. In 2008 the construction measures ended after investments amounting to €35 million. Eilenburg was the first city in Saxony completely protected against flood. Since 1 August 2008 Eilenburg lies roughly in the middle of the then newly formed
Nordsachsen (northern Saxony) District. ==Twinned cities==