For 10 points, name this region in Germany which lent its name to one of the tribes that conquered England.
An early vernacular law code compiled by Eike von Repkow was used in this region and was known as its "mirror". This region was granted a constitution in 1831 and was ruled for almost twenty years by Frederick Augustus II. Descendants of Frederick the Warlike squabbled over the possessions of the House of Wettin centered on this region, leading to a split between its eastern Albertine and western Ernestine lands, the latter of which were a set of duchies named for this region in Thuringia. Henry the Lion ruled the duchy here for the House of Welf until Frederick Barbarossa broke it up. The Liudolfing dynasty of Holy Roman Emperors is sometimes named after this region, since its first ruler, Henry the Fowler, was duke of this region. One city in this region lent its name to a British ruling house whose last member, Victoria, married the son of the duke of one duchy named for this region, that of Coburg and Gotha. For 10 points, name this region in Germany which lent its name to one of the tribes that conquered England.
An early vernacular law code compiled by Eike von Repkow was used in this region and was known as its "mirror".
{Saxony} (or {Sachsen} or {Saxe} )