In the attic of the main building of Tartu University is another intriguing place- the little room where the students who infringed the university's Code of Conduct used to "do time" and left verses or monograms in Latin and german on the walls, ceiling and the doors. Ask about the lock-up in the Univeristy Art Museum.
This place tells a story on its own. You wouldn't believe how many important people have stayed up there.
Ask for a guided ghost tour!