This architectural feature offers organisers countless possibilities for its use: it is an ideal venue for conferences, lectures, receptions, theatrical performances and private parties.

The round arches are made of red bricks and, together with the wooden floor, create a pleasant atmosphere for parties, meetings, smaller conferences or theatre and concert performances.

The inner courtyard adjoins the bistro garden and the neo-Gothic chapel at the foot of the Middle Fortress. It is ideal for major musical events, theatrical performances and social events of all kinds.

The dominant element in this part of the complex is vegetation, which not only covers the courtyards but also adorns the roofs. The Middle Fortress can be used to stage larger festivals, exhibitions or concerts. The interiors (also suitable as exhibition pavilions) and outdoor areas can be used in tandem.