Wallhausen is a municipality in the Mansfeld-Südharz

Mansfeld-Südharz

- History :The district was established by merging the former districts of Sangerhausen and Mansfelder Land as part of the reform of 2007.- Towns and municipalities :The district Mansfeld-Südharz consists of the following subdivisions:-References:...

 district of Saxony-Anhalt

Saxony-Anhalt

Saxony-Anhalt is a landlocked state of Germany. Its capital is Magdeburg and it is surrounded by the German states of Lower Saxony, Brandenburg, Saxony, and Thuringia.Saxony-Anhalt covers an area of...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. It is located on the Helme

Helme

Helme may refer to:* Helme a long river in central Germany*Helme Parish, a rural municipality in Valga County, Estonia**Helme, a small borough in Helme Parish**Helme Castle in Helme...

 river north of the Kyffhäuser

Kyffhäuser

The Kyffhäuser is a range of hills located on the border of the German state of Thuringia with Saxony-Anhalt. It stands on the southern edge of the Harz. The range has a length of and a width of . It reaches its highest point at the Kulpenberg , situated in Thuringia...

 mountain range and the border with Thuringia

Thuringia

The Free State of Thuringia is a state of Germany, located in the central part of the country.It has an area of and 2.29 million inhabitants, making it the sixth smallest by area and the fifth smallest by population of Germany's sixteen states....

. Wallhausen is part of the Verbandsgemeinde

Verbandsgemeinde

A Verbandsgemeinde is an administrative unit in the German Bundesländer of Rhineland-Palatinate and Saxony-Anhalt.-Rhineland-Palatinate:...

("collective municipality") Goldene Aue

Goldene Aue, Saxony-Anhalt

Goldene Aue is a Verbandsgemeinde in the Mansfeld-Südharz district, in Saxony-Anhalt, Germany. Before 1 January 2010, it was a Verwaltungsgemeinschaft. It is situated south and west of Sangerhausen. It is named after the Goldene Aue valley...

.

In 909 Henry the Fowler, the son of Duke Otto I of Saxony

Otto I, Duke of Saxony

Otto , called the Illustrious by later authors, was the Duke of Saxony from 880 to his death. He was the younger son of Duke Liudolf of Saxony and his wife Oda of Billung, and succeeded his brother Bruno as duke after the latter's death in battle in 880...

, married Matilda of Ringelheim

Matilda of Ringelheim

Saint Mathilda was the wife of King Henry I of Germany, the first ruler of the Saxon Ottonian dynasty, thereby Duchess consort of Saxony from 912 and German Queen from 919 until 936. Their eldest son Otto succeeded his father as German King and was crowned Holy Roman Emperor in 962...

 at the Pfalz

Kaiserpfalz

The term Kaiserpfalz or Königspfalz refers to a number of castles across the Holy Roman Empire which served as temporary, secondary seats of power for the Holy Roman Emperor in the Early and High Middle Ages...

of Wallhausen, their son Otto

Otto I, Holy Roman Emperor

Otto I the Great , son of Henry I the Fowler and Matilda of Ringelheim, was Duke of Saxony, King of Germany, King of Italy, and "the first of the Germans to be called the emperor of Italy" according to Arnulf of Milan...

 was born here in 912. King Otto III

Otto III, Holy Roman Emperor

Otto III , a King of Germany, was the fourth ruler of the Saxon or Ottonian dynasty of the Holy Roman Empire. He was elected King in 983 on the death of his father Otto II and was crowned Holy Roman Emperor in 996.-Early reign:...

 gave the castle to his aunt Abbess Matilda of Quedlinburg

Matilda, Abbess of Quedlinburg

Matilda , also known as Mathilda and Mathilde, was the first Princess-Abbess of Quedlinburg. She was the daughter of Otto I, Holy Roman Emperor, and his second wife, Adelaide of Italy.- Taking the veil :...

 in 985. Wallhausen later was a possession of the Saxon Electorate

Electorate of Saxony

The Electorate of Saxony , sometimes referred to as Upper Saxony, was a State of the Holy Roman Empire. It was established when Emperor Charles IV raised the Ascanian duchy of Saxe-Wittenberg to the status of an Electorate by the Golden Bull of 1356...

, it became part of the Prussian Province of Saxony

Province of Saxony

The Province of Saxony was a province of the Kingdom of Prussia and later the Free State of Prussia from 1816 until 1945. Its capital was Magdeburg.-History:The province was created in 1816 out of the following territories:...

in 1815.