The senior line of the partitioned Principality of Anhalt, c.1252-1315. When the line died out in 1315, Aschersleben, which is northeast of the Harz Mountains, southeast of Halberstadt, and SSW of Magdeburg, passed to the Bishops of Halberstadt. The Ascanians (Askanier), the dynasty that reigned in Anhalt, derived their name from a Latin form of Aschersleben. Ascanians were also Margraves of the Nordmark and then of Brandenburg, 1134-1320, and Dukes of Saxony from 1180. The junior line of Saxon Dukes – of Saxe-Wittenberg – were Electors of Saxony, from 1356 until their extinction in 1422. The senior line were Dukes of Saxe-Lauenburg until their extinction in 1689.