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| This earliest known image of Fort McHenry dated 1819 shows the boundary wall above the fort, the sea wall surrounding the perimeter of the fort, the water batteries, and an overview of the star shaped fort structure. The "J" shaped structure identifies the location of the earliest waterfront cannon batteries. The black rectangles locate buildings which were on the fort grounds at that time, such as a tavern, barracks, and a hospital. These buildings no longer remain above ground, but archeologists have been able to find the foundations and relics remaining from the period. This map has been useful in determining the locations for archeological digs. |