Crown Fortress The Crown Fortress is the last complete remnant of a Baroque bastion fortress from the time of Maria Theresa. In one part it is surrounded by a crown wall and flows around the Mlýnský náhon, in other parts it is adjacent to the botanical garden and the rosarium. The area is now an important cultural centre where many events are held. The baroque powder room houses a small museum about the history of the Olomouc fortifications. In the former large artillery warehouse there is a science centre of Palacký University called Fortress of Knowledge. An amphitheatre was built in the bastion of the wall. The outdoor area is freely accessible.