American Civil War and late 19th century thumb|right|East Martello Tower thumb|Fort Zachary Taylor in Key West, active during the Civil War, contains the largest collection of Civil War cannons ever discovered at a single location.
American Civil War and late 19th century thumb|right|East Martello Tower thumb|Fort Zachary Taylor in Key West active during the Civil War contains the largest collection of Civil War cannons ever discovered at a single location