In the 19th century, lock-up detainment was used at the University of Tartu as a punishment for unruly students. Students passing solitary hours in the lock-up killed time by scribbling on the walls. This was done using ink, charcoal or candles.
The wrapping depicts one of the drawings on the walls of the lock-up of the University of Tartu.
Visit the lock-up: www.kunstimuuseum.ut.ee/en