the fat tower of the unteres schloss castle at siegen in the state of north rhine-westphalia in germany

siegen castle tower westphalia north rhine-westphalia germany palace belfry middle ages medieval tall fortress keep donjon bergfried schloss unteres yellow siegberg old ancient historic sight sightseeing famous german rhineland sauerland sieg westerwald europe european stone picturesque landmark tourism tourist attraction fat south westphalian district siegen-wittgenstein arnsberg region state