A POW camp was located in Suomenlinna at the beginning of independence, from 14 April 1918 until 14 March 1919. The memorial in the Casino Park consists of two rocks, one in natural condition and one quarried, and a rectangle cut in stone. The work of art was created by shaping the existing environment. The years 1918 and 1919 have been cut into the rock, which is constantly worn by flowing water. Attached to the work is a plaque with the name and date of the prison camp written on it.