Principality of Anhalt

The Principality of Anhalt (German: Fürstentum Anhalt) was a State of the Holy Roman Empire, located in Central Germany, in what is today part of the federal state of Saxony-Anhalt.

Under the rule of the House of Ascania, the Anhalt territory was split off the German stem duchy of Saxony in 1212 and granted to Count Henry I, who was raised to the rank of a Prince of the Holy Roman Empire in 1218. Ruled by Ascanian princes from the High Middle Ages to the Early modern period, Anhalt was divided several times amongst various lines of the dynasty until the dissolution of the Empire in 1806, when Napoleon elevated the remaining states of Anhalt-Bernburg, Anhalt-Dessau and Anhalt-Köthen to duchies.

The Anhalt territory stretched from the Harz mountain range in the west to the Elbe River and beyond to the Fläming Heath in the east. Upon the 1315 loss of Anhalt-Aschersleben, the lands around Ballenstedt formed a western exclave. The area of the later duchy was 906 sq mi (2,300 km²).

In the west, the land is undulating and in the extreme northwest, where it forms part of the Harz mountains, hilly, with the Ramberg (Harz) peak as the tallest point at 1,900 ft (579 m). From the Harz the country gently shelves down to the Saale; the land between this river and the Elbe is particularly fertile. East of the Elbe, the land is mostly a flat sandy plain, with extensive pine forests, interspersed with bog-land and rich pastures. The Elbe is the chief river, intersecting the eastern portion of the former duchy, from east to west, and at Rosslau is met by the Mulde. The navigable Saale takes a northerly direction through the central portion of the territory and receives, on the right, the Fuhne and, on the left, the Wipper and the Bode.

The climate is generally mild, less so in the higher Harz regions to the south-west.

From the 9th century onward, the western parts of the later Anhalt territory up to the Elbe and Saale rivers were included in the Schwabengau region of Eastphalia, the eastern part of the medieval Duchy of Saxony. In the 11th century, it came under the rule of Count Esico of Ballenstedt (died 1059 or 1060), mentioned in a 1036 deed issued by Emperor Conrad II at Tilleda. Possibly a descendant of the Saxon margrave Odo, he owned large allodial lands around Ballenstedt in the Schwabengau as well as in the adjacent Gau Serimunt in the former Saxon Eastern March.

Count Esico was succeeded by his son Adalbert II of Ballenstedt, who also appeared as a count in the Saxon Nordthüringgau and further territories in the Eastern March. Adalbert joined the Saxon Rebellion against King Henry IV and was slain in a feud with Egeno II of Konradsburg in 1080. His son Count Otto the Rich appeared as a "Count of Ballenstedt" from 1106. When Emperor Henry V temporarily deprived Lothair of Supplinburg of the Saxon ducal title in 1112, Otto was enfeoffed with the Duchy of Saxony, which, however, he had to renounce shortly afterwards, as Lothair and Henry had reconciled. On the eve of the 1115 Battle of Welfesholz, Otto campaigned the lands of the Polabian Slavs, gaining large estates around Zerbst up to the Hevelli lands ruled by the Hevelli princes.

Until his death in 1123, Count Otto had Anhalt Castle built in the Harz mountains near Harzgerode and appears to have been among the first to assume the title of a "Count of Anhalt". He was the father of Albert the Bear, who temporarily was appointed Margrave of the Saxon Eastern March (or March of Lusatia) by the Saxon duke Lothair of Supplinburg and struggled for the ducal title himself. Albert could not prevail against the Welf duke Henry the Lion, nevertheless he conquered the eastern territories of the former Northern March, which had been lost in the 983 Great Slav Rising, where he established the Margraviate of Brandenburg in 1157. When he died in 1170, his younger son Count Bernhard inherited the Ascanian home territories around Anhalt Castle and after the deposition of Henry the Lion by Emperor Frederick Barbarossa finally became Duke of Saxony in 1180. However, he effectively only ruled over the Eastphalian territories, while the Westphalian and Engern parts of Saxony fell under the control of the Prince-Archbishops of Cologne.