In 1971, a riot at Kingston Pen (as it is locally known) lasted several days and resulted in the death of two inmates and destruction of much of the prison. Security was substantially increased and prison reforms instituted. Today the facility houses between 350 and 400 inmates, all in individual cells.
The Kingston Pen is home to many of Canada's most dangerous and notorious criminals. Kingston is home to seven prisons, from low-security facilities to super-maximum-security facilities like Kingston and Millhaven Penitentiary.
In 1999, prisoner Ty Conn escaped from the prison, a feat that had previously been believed to be impossible. He was later found in Toronto, but committed suicide rather than being captured.
Official Site: http://www.csc-scc.gc.ca/text/facilit/institutprofiles/kingston_e.shtml