Caption:
A map of Europe, showing territorial borders existing in the 11th century, specifically in 1074. The Treaty of Gerstungen was concluded on 2 February 1074 in Gerstungen Castle on the River Werra in what is now Germany. It required King Henry IV to restore the Duke Otto of Northeim to the Duchy of Bavaria. In 1073 the latter had successfully headed the rebellion of the Saxons. Map published in 1831.