The castle rock was built in 1812 in anticipation of the imperial visit as part of a walk route below the castle along the banks of the Ohře River.
The castle rock was built in 1812 in anticipation of the imperial visit as part of a walk route below the castle along the banks of the Ohře River. It was named after the former regional governor. It is a small building on a hexagonal ground plan covered with a pyramid roof. In the summer season it is open to the public.