Francis Bannerman VI was an American businessman and military surplus dealer, known for his unique collection of military artifacts. He founded the Bannerman Castle on Pollepel Island in the Hudson River, which served as a storage facility for his extensive inventory of military goods. The castle became a notable landmark and a symbol of his entrepreneurial spirit. Bannerman was born in 1851 and began his business in the late 19th century, capitalizing on the surplus of military equipment after the Spanish-American War. His company, Bannerman's, became famous for selling everything from uniforms to artillery, attracting collectors and enthusiasts alike.