The Auerspergs were among the largest landowners in Carniola. In addition to Turjak Castle, which was their central possession, for centuries they were the owners of many other properties, both within and outside their territories. Among these were two Baroque palaces in the center of Ljubljana, "Turjaška palača" (Auersperg Palace) and (Princely Palace). They were both damaged in the 1895 Easter earthquake and the land was sold to the municipality. The Slovene National and University Library was built on the site of the Princely Palace in the 1930s, modelled on the latter's size and form. The City Museum of Ljubljana was opened at the Auersperg Palace in 1937.