One museum holds 137 million items—95% never on display

The Bequest That Built an Empire

James Smithson died in Genoa in 1829, leaving his entire estate—104,960 gold sovereigns worth roughly $500,000—to his nephew with a peculiar contingency: if the nephew died childless, the fortune would go to the United States to found an institution bearing Smithson's name. When the nephew died without heirs in 1835, Congress spent eleven years debating what to do with money from a man who'd never visited America. Former President John Quincy Adams, then a congressman, championed the gift against skeptics who thought accepting foreign charity beneath national dignity. President James K. Polk finally signed the founding act on August 10, 1846, establishing the Smithsonian Institution in Washington, D.C.

The original collection arrived almost immediately through the U.S. Exploring Expedition of 1838–1842, a naval voyage that circumnavigated the globe. The expedition returned with thousands of ethnographic artifacts, botanical specimens, shells, minerals, and animal pelts from the Pacific, Antarctica, and South America. These objects filled the Smithsonian Castle, designed by architect James Renwick Jr. and completed in 1855. Secretary Joseph Henry, a physicist, initially resisted becoming a repository, preferring scientific research and publication. But expeditions, government transfers, and donations kept flooding in—including specimens from the 1876 Centennial Exhibition in Philadelphia—and the Smithsonian's identity as America's attic became irreversible.

Nineteen Museums and What They Actually Hold

The National Museum of Natural History alone houses 146 million specimens and objects, though the Institution's official count is 137 million because some categories overlap in databases. The entomology collection contains 35 million pinned insects, the world's largest, with beetles organized in tens of thousands of drawers at the Museum Support Center in Suitland, Maryland. The National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Virginia, stores a Boeing 307 Stratoliner, the Space Shuttle Discovery, and an SR-71 Blackbird in a hangar spanning 760,000 square feet. The National Museum of American History preserves 1.8 million objects including Abraham Lincoln's gold pocket watch, Julia Child's entire kitchen relocated from Cambridge, and the original Star-Spangled Banner flag, which required a $30 million conservation effort completed in 2008.

The National Museum of African American History and Culture, which opened in 2016, acquired 40,000 objects in a decade including Harriet Tubman's hymnal and a segregated railway car from the 1920s. The Archives of American Art holds 20 million documents spanning paintings' provenance to artists' correspondence. The Smithsonian Tropical Research Institute operates in Panama with living collections of tropical species. Meanwhile, the National Zoological Park in Washington houses 2,700 animals representing 390 species, including the giant pandas that arrived in 1972 as diplomatic gifts from China following Richard Nixon's visit.

The Conservators Who Never Sleep

When Neil Armstrong's spacesuit began deteriorating in storage during the 1990s, conservators discovered the suit's rubber components were off-gassing, releasing acidic vapors that threatened the nylon fabric. The suit now rests in a climate-controlled case at 63 degrees Fahrenheit and 30% relative humidity, monitored by sensors every fifteen minutes. Lisa Young, a conservator at the National Air and Space Museum, spent years researching the suit's 21 layers of material, some manufactured by companies long defunct. A 2015 Kickstarter campaign raised $719,779 from 9,477 backers to fund a new display case, demonstrating that even iconic objects require constant intervention to survive.

The Museum Support Center in Suitland employs collections managers who rotate textiles to prevent fold lines from becoming permanent, chemists who analyze paint samples under electron microscopes, and paleontologists who still prepare fossils extracted decades ago. In 2019, the Smithsonian employed 6,300 staff members, including 500 scientists conducting active research. One researcher studying the herbarium's 5 million dried plants discovered a species thought extinct since 1910 preserved in a cabinet, enabling a search that found living specimens in a Hawaiian forest. Another team analyzing 19th-century bird skins detected mercury and arsenic preservatives, requiring special handling protocols for anyone accessing pre-1900 taxidermy specimens.

Why Digital Access Changes Everything

On February 25, 2020, the Smithsonian released 2.8 million high-resolution images into the public domain with no copyright restrictions, the largest such release by any museum. Users downloaded the Apollo 11 command module's 3D scan, Frida Kahlo's letters, and daguerreotypes from the 1840s within hours. The Open Access initiative expanded to 4.5 million images by 2023, enabling teachers in rural Montana to build lesson plans around original documents and designers in Singapore to reference patent models from the 1850s. The digitization effort costs roughly $1,000 per object when including photography, metadata creation, and database entry, meaning the Institution's full collection would require $137 billion to digitize at current rates.

The Smithsonian's federal funding reached $1.04 billion in 2023, covering roughly 60% of its operating budget, with private donations, grants, and endowment income filling the gap. But the Institution faces a $2.46 billion maintenance backlog across aging buildings, some over a century old. The National Museum of American History closed for two years starting in 2006 for $85 million in renovations. Meanwhile, institutions worldwide measure themselves against the Smithsonian's scale—the British Museum claims 8 million objects, the Louvre 615,000—but none approach its range across art, history, culture, and science. Each object represents a choice about what future generations should inherit, from Cherokee baskets to Mars meteorites, ensuring that knowledge survives beyond any single lifetime or government.