Gratiot Street Prison
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Gratiot Street Prison was an American Civil War prison located in St. Louis, Missouri. Run by the Union Army, it housed Confederate prisoners-of-war, confederate sympathizers, guerrillas, spies, and Federal soldiers accused of crimes. The prison building was previously a medical school named McDowell's College, which was confiscated by the Union Army and converted to a prison in 1861. It was located at the corner of Gratiot and 8th Streets in St. Louis, and demolished in 1878.