sentences:  In 1122 they also inherited the allodial possessions of their Eppenstein predecessors in Upper Styria.Once the political turmoils of the fierce Investiture Controversy had ended, Margrave Leopold the Strong (1122–1129) and his son Ottokar III (1129–1164) gradually gained independence from the Carinthian dukes and were able to acquire large territories along the Savinja river down to the Windic March.Leopold had the town and castle of Hartberg laid out; Margrave Ottokar III extended his influence down the Mur river into the "Mark an der Sann" territory (Lower Styria) and moved his residence to Graz, he already began to call himself "princeps".