Founded in 1846, the Smithsonian is the world's largest museum and research complex, consists of 19 museums and galleries, the National Zoological Park, and nine research facilities.
The Museum of Natural History will provide access to numerous files on archeology and studies of early civilizations.
USA.gov - As the U.S. Government's official web portal, USA.gov makes it easy for the public to get U.S. Government information and services on the web. An ever-growing amount of state and local information is included in the search results.
While this may not seem like a logical place to research ancient history, the portal includes information from several federal agencies: