Maryland's 24 public library systems and 15 bookmobiles held 15,387,000 volumes in 2000 and had a combined circulation of 45,393,000. The center of the state library network is the Enoch Pratt Free Library in the city of Baltimore; founded in 1886, it had 28 branches, over 2.8 million volumes, and a circulation of over 1.5 million in 1999. Each county also has its own library system. The largest academic libraries are those of Johns Hopkins University (2,507,232 volumes in 1999) and the University of Maryland at College Park (2.2 million). The Maryland Historical Society Library specializes in genealogy, heraldry, and state history. The Maryland State Archives houses government records, private manuscripts, maps, and photographs. Maryland is also the site of several federal libraries, including the National Agricultural Library at Beltsville, with over two million volumes; the National Library of Medicine at Bethesda, 2,200,000; and the National Oceanic and Atmospheric Administration Library at Rockville, with about one million volumes in 1999. Total income for the public library system in 2000 was $174,458,000; including $2,267,954 in federal grants and $23,551,830 in state grants. Per capita spending was $32.55 in 1999.
Of the approximately 147 museums and historic sites in the state, the major institutions are the US Naval Academy Museum in Annapolis and Baltimore's Museum of Art, National Aquarium Seaport and Maritime Museum, Maryland Academy of Sciences, the Maryland Historical Society Museum, and Peale Museum, the oldest museum building in the US. Important historic sites include Ft. McHenry National Monument and Shrine in Baltimore (inspiration for "The Star-Spangled Banner") and Antietam National Battlefield Site near Sharpsburg.