Титмар Мерзебургский
The conduct of the siege, as well as the more general campaign of Henry II during 1017 was described by the German chronicler Thietmar of Merseburg. The failure after 15 years of fighting forced the emperor to agree to the Peace of Bautzen which left the Milceni lands and Lusatia under Polish control. Emperor Conrad II reconquered the territories in 1031.