 The rooms above the clockwork mechanism were used by the city administration for various purposes up until the late 20th century , including as archives , storerooms , as a firehose magazine and even as an air raid shelter . The interior was frequently remodelled in a careless , even vandalistic fashion ; for instance , all but three of the original wooden beams supporting the intermediate floors were destroyed . Since 1979 , the tower 's interior is empty again . It is only accessed for maintenance and in the course of regular guided tours . 
