 In 1893–94, the exterior wall was lowered by 6.5 m, making it possible to free the walled-up windows on the south side of the Landvogt's residence, and to dry out the walls.A rose garden was laid out on top of the now lower embankment.During the comprehensive renovation of 1978–86, the last remnant of the embankment was removed and a basement level excavated, which now houses part of the Aargau Museum.