 Today the building houses part of the Aargau Museum, with a permanent exhibit on the lives of the castle owners from the late Middle Ages until the 20th century.The bastion on the eastern perimeter of the inner bailey was constructed in 1642–46, replacing a curtain wall with battlements, to close the gap between the "Palas" and the Landvogt's residence and protect the castle from cannon bombardment from the Goffersberg.The adjacent residence was covered by a huge earthen embankment which absorbed moisture and rendered the building uninhabitable.