Anhalt-Dessau in the context of "Principality of Anhalt"

Anhalt-Köthen [ˈʔanhalt ˈkøːtn] was a principality of the Holy Roman Empire ruled by the House of Ascania. It was created in 1396 when the Principality of Anhalt-Zerbst was partitioned between Anhalt-Dessau and Anhalt-Köthen. The first creation lasted until 1562, when it fell to Prince Joachim Ernest of Anhalt-Zerbst, who merged it into the reunited Principality of Anhalt.

Anhalt-Köthen was created a second time in 1603, when Anhalt was again divided. In 1806, Anhalt-Köthen was raised to a duchy. With the death of Duke Henry on 23 November 1847, the Anhalt-Köthen line became extinct and its territories were united to Anhalt-Dessau by patent of 22 May 1853. Today, Anhalt-Köthen is mostly remembered as a long-time residence of Johann Sebastian Bach, while he worked for Leopold, Prince of Anhalt-Köthen.

The House of Ascania is an Old Saxon high noble family historically documented since the 11th century. It is also known as the House of Anhalt, which refers to its longest-held possession. Their ancestral seats, Ballenstedt, Anhalt, Aschersleben, and Bernburg, are located in the present-day Anhalt region in Saxony-Anhalt. The ruins of Anhalt Castle are situated in the Harz Mountains northeast of Harzgerode. The name "Askanier" derives from the Latinization of their seat at Aschersleben. Since the late 17th century, only the Anhalt branch has survived. Albert the Bear became Duke of Saxony in 1138 and, with the control of the Margraviate of Brandenburg in 1150, the first Margrave in the formerly Slavic settlement area. In 1180, eastern parts of the Stem Duchy of Saxony passed to the Askanier Bernhard of Saxony. As Dukes of Saxe-Wittenberg, the family received hereditary electoral dignity in 1356. The family ruled Anhalt-Dessau, Anhalt-Bernburg, Anhalt-Köthen, Anhalt-Zerbst, Anhalt-Plötzkau, and Anhalt-Aschersleben. Alexius Friedrich Christian of Anhalt-Bernburg was the first of the Anhalt princes to gain the title of Duke in April 1806. The ducal title was adopted in Anhalt-Köthen and Anhalt-Dessau in 1807. Since 1863, only the Dessau line has existed, with Aribert of Anhalt abdicating in 1918 due to the November Revolution in the Duchy of Anhalt. Since 1963, Eduard, Prince of Anhalt has been the head of the family.

Anhalt-Bernburg was a principality of the Holy Roman Empire and a duchy of the German Confederation ruled by the House of Ascania with its residence at Bernburg in present-day Saxony-Anhalt. It emerged as a subdivision from the Principality of Anhalt from 1252 until 1468, when it fell to the Ascanian principality of Anhalt-Dessau. Recreated in 1603, Anhalt-Bernburg finally merged into the re-unified Duchy of Anhalt upon the extinction of the line in 1863.