period, several tribes known as the Saxons emerged, from which the subsequent state(s) draw their name. Stem Duchy of Saxony The first medieval Duchy of Saxony was a late Early Middle Ages "Carolingian stem duchy", which emerged around the start of the 8th century AD and grew to include the greater part of Northern Germany, what are now the modern German states of Bremen, Hamburg, Lower Saxony, North Rhine-Westphalia, Schleswig-Holstein and Saxony-Anhalt. Saxons converted to Christianity during this period, with Charlemagne outlawing pagan practices. This geographical region is unrelated to present-day Saxony but the name moved southwards due to certain historical events (see below). The territory of the Free State of Saxony, called White Serbia was, since the 6th century, populated by Slavs before being conquered by Germans e.g. Saxons and Thuringii. It was not part of the old Saxon stem duchy. A legacy of this period is the Sorb population in Saxony. Eastern parts of present Saxony were ruled by Poland between 1002 and 1032 and by Bohemia since 1293. Holy Roman Empire The territory of the Free State of Saxony became part of the Holy Roman Empire by the 10th century, when the dukes of Saxony were also kings (or emperors) of the Holy Roman Empire, comprising the Ottonian, or Saxon, Dynasty. Around this time, the Billungs, a Saxon noble family, received extensive lands in Saxony. The emperor eventually gave them the title of dukes of Saxony. After Duke Magnus died in 1106, causing the extinction of the male line of Billungs, oversight of the duchy was given to Lothar of Supplinburg, who also became emperor for a short time. 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. In 1180 large portions west of the Weser were ceded to the Bishops of Cologne, while some central parts between the Weser and the Elbe remained with the Guelphs, becoming later the Duchy of Brunswick-Lüneburg. The remaining eastern lands, together with the title of Duke of Saxony, passed to an Ascanian dynasty (descended from