Under the rule of the Ascanian count Henry I ( c. 1170 -- 1252 ) named after Anhalt Castle in the upper Selke valley .
Henry I ( c. 1170 -- 1252 ) is the Schwabengau estates became the nucleus of the Anhalt principality .
Under the rule of the Ascanian count Henry I ( c. 1170 -- 1252 ) , the Schwabengau estates became the nucleus of the Anhalt principality , named after Anhalt Castle in the upper Selke valley .