Hagley Museum and Library houses important collections of manuscripts, photographs, books, and pamphlets documenting the history of American business and technology. The museum is home to the world's largest private collection of 19th century patent models, as well as artifacts pertaining to DuPont Company history and du Pont family history. It is also the site of the gunpowder works founded by E. I. du Pont in 1802. This example of early American industry includes restored mills, a workers' community, and the ancestral home and gardens of the du Pont family. Main exhibits at the museum cover the DuPont Company history and Hagley's 19th century industrial community. Other places run by the museum include Eleuthrian Mills, the first du Pont home, the Hagley Powder Yard, which dates back to the time of water power, and Workers' Hill, which looks at social and family histories of workers at the powder mills.