 In the following 150 years under the Ascanians, it would expand to include many more regions, but during Otto's years as Margrave, his main goal was to stabilize and secure the Margraviate by intensifying settlement in the regions he controlled.In 1180, Otto founded the Lehnin Abbey in Zauche as the Margraviate's first monastery, in which he would be buried four years later.This Cistercian monastery became the house monastery and burial ground for the House of Ascania, and later also for the House of Hohenzollern.