With a complete lack of freedom, students were supposed to pay for their sins behind the closed doors of the detention room. This solitary detention revealed itself to be an opportunity for freedom of speech which is evident in the numerous doodles on the walls. For instance, an anonymous student made fun of the meteorologist Ernst Klinkerfues (1827-1884) but his drawing talent wasn’t sufficient for a portrait. Instead, the instruments of research depicted represent Professor “Klinkerleg”: every evening, the telescope of his daily astronomic observations turns into a wine bottle. Thus, in the detention room, the Professor is degraded from scientific authority to drunkard.