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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

The HowStuffWorks History section chronicles the history of world regions. Take a comprehensive look at the past in HowStuffWorks History.

Comprehensive collection of constitutional materials, including books, articles, and tools.

Comprehensive site for 19th century history, featuring timelines and articles about historical events of the 1800s, including the Civil War, American elections, westward expansion, immigration, and the rise of technology.

USConstitution.net offers the text of the Constitution, the Declaration of Independence, the Articles of Confederation, a FAQ, glossary, comment/question area, and links to other resources

U.S. History covers the development of the United States from the history of early exploration through modern times. American historical people are presented in the context of the development of the American nation on political, economic, and social...

The Library of Congress. The Library of Congress is the nation

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