Old Trois-Rivières Prison, Heritage prison in Trois-Rivières, Canada
The Old Trois-Rivières Prison is a single 28-metre by 11-metre stone building designed by François Baillairgé in English Palladian style. Its three sections comprise a central block for reception, administration, chapel, kitchen and refectory, flanked by two cell-block wings; the west wing's second floor housed the governor and his family, with dungeons in the basement.
François Baillairgé drew the plans in 1815, construction ran from 1816 to 1822 with a halt in March 1819 for lack of funds, and the prison stayed in use until 1986 — 164 years, the longest-serving penal institution in Canada. It survived the great fire of 1908 and was classified a historic monument on 5 May 1978.
Since 1996 the prison has been visited through the "En prison!" experience, led by guides including former inmates. Visitors enter the cells and basement dungeons and hear about sentences: in the 19th century 78% of terms were under fifteen days, mostly for vagrancy, drunkenness or theft. Seven hangings took place here, the last in 1934.
The site is located in the downtown area and easily reached on foot from nearby streets. Plan to spend at least two hours for a thorough visit, and guided tours offer deeper insights into daily operations and the experiences of inmates throughout the years.
The building is one of the few structures in the city that survived the major fire of 1908 and continued its original purpose for many decades afterward. This resilience makes it a rare example of architectural persistence through a critical moment in local history.
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