 The Margravate of Meissen was founded in 985 as a frontier march, that soon extended to the Kwisa (Queis) river to the east and as far as the Ore Mountains.In the process of Ostsiedlung, settlement of German farmers in the sparsely populated area was promoted.In 1137, control of Saxony passed to the Guelph dynasty, descendants of Wulfhild Billung, eldest daughter of the last Billung duke, and the daughter of Lothar of Supplinburg.