Harbor Defense Museum

The Harbor Defense Museum, sometimes called The Caponier, located within the grounds of Fort Hamilton in the Bay Ridge section of Brooklyn is a 19th-century fort, New York City's only military museum and one of only seventy military museums in the United States that is funded and operated by the Defense Department.The Caponier, the given name of the building that now houses the museum, was a flank battery whose mission was to protect the main fortress from rear attacks, was originally a small fort within the larger fort, and now serves as the guardian of Fort Hamilton's history.