In 1143, Conrad also became Count of Groitzsch and Rochlitz and Vogt (bailiff) in Chemnitz and Naumburg. He eased the tensions with the neighbouring Kingdom of Poland by marrying his son Theodoric to Dobroniega Ludgarda, a daughter of the Polish duke Bolesław III Wrymouth. He also married his eldest son Otto II to Hedwig of Brandenburg, a daughter of Margrave Albert the Bear.
