road. Evidence of conflicts between the Romans, their power waning, and the Allemanic and other Germanic groups, their power rising, appears throughout the region. New settlements appeared on top of burned settlements and old villages and farmsteads reclaimed first by forests and meadows and then again reclaimed by men. By the latter half of the fourth century, several families emerged as the warrior leaders, capable of fending off minor Roman come-backs, and of protecting themselves, their kin, and their dependents from not only the Romans, but other groups. As the Romans withdrew more and more of their forces, to concentrate on the western boundaries or to focus on the conquest defense of Iberia, Franks, particularly Clodwig, or Clovis (482–511), and Goths, particularly Theodorich (471–527) contested for control of the region. Throughout this period, Allemanic dukes maintained their primary seat in Überlingen. The Alemannic Überlingen was first mentioned in 770 as Iburinga. Before that, it was probably known as Gunzoburg (641), the seat of the Alemannic or Swabian duke Gunzo. The probable site of Gunzo's villa has been identified in the northwestern quadrant of the city, just outside the present day inner moat. Medieval period The Allemanic dukes were well connected to other families throughout Europe; the first wife of Charlemagne, Hildegard, came from the family of Linzgau counts, whose seat in Buchhorn (present-day Friedrichshafen) bordered the lake. Louis the Pious 814–840 and Louis the German 843–876 both married women from the Allemmanic Welfen families. In the tenth century, the Linzgau fell to an invasion of the Hungarians, and ongoing battles with the Hungarians nearly brought the families of the region to ruin. The Investiture Controversy of the 11th-century brought further conflict. Villages and properties in the possession of one side of the conflict would be besieged and destroyed by members of the other party, in gruesome battle after gruesome battle, but by the end of the 11th century, and the first half of the 12th, the Hohenstaufen emperors stabilized the Holy Roman Empire. The family came from the region and Swabia, the Linzgau, and the Bodensee region became the middle point of the Empire. This is also the beginning of Überlingen's period of blossoming. Many of the documents from the period have been lost, possibly in the city fire in 1279, but a great deal can be extrapolated. Hand in hand with the expansion of the Holy Roman Empire, localities