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Kingston Penitentiary (known locally as KP and Kingston Pen) is a maximum security prison located in Kingston, Ontario between King Street West and Lake Ontario. Originally constructed in 1833–1834, and officially opened on June 1, 1835 as the "Provincial Penitentiary of the Province of Upper Canada," it is one of the oldest prisons in continuous use in the world. Kingston Penitentiary is one of nine ...