| 1911 Edition Encyclopedia: Louisiana Purchase: Article from the 1911 Encyclopedia Britannica. |
| American Originals: Louisiana Purchase Treaty, 1803: Scanned image of the original treaty signed with France. From the National Archives and Records Administration web site. |
| Avalon Project at Yale Law School:The Louisiana Purchase, 1803: Contains documents relating to the purchase: treaties, conventions, statutes, and messages to Congress during the period 1800-1804. Also includes Hunter Miller's notes on the 1803 treaty of purchase. From the Avalon Project web site of documents in law, history, and diplomacy. |
| History Buff: Articles on Major Events: Louisiana Purchase: Full text of news reports published in the Columbian Centinel and Massachusetts Federalist newspaper in Boston, from March 16, 1803 through November 30, 1803. |
| James Madison Center: Text of the 1803 purchase treaty negotiated by Madison as Secretary of State, a brief history, text of a Congressional resolution authorizing funds for the purchase, and 1903 speech by President Theodore Roosevelt on its significance in American history. From the James Madison University web site. |
| Louisiana State Museum: The Cabildo: Louisiana Purchase: Brief history of the treaty transactions in which Louisiana passed from Spanish control to French and then, twenty days later in December 1803, became part of the United States. Includes portraits of the men involved and additional history of the Cabildo government building in New Orleans. |
| NapoleonSeries: Reference Library of Diplomatic Documents: The Louisiana Purchase: Text of the 1803 treaty between the United States and France, two related conventions, and extracts from diplomatic correspondence about negotiations between the two countries. |
| State Historical Society of Missouri: Louisiana Purchase Bibliography: Lists works available in the society's collections. |
| Teaching about the Louisiana Purchase: Provides an overview of the Louisiana Purchase with tips for teaching about it to students. |
| The Louisiana Purchase: Developed as a college course project, this site covers the history of the purchase, presents primary source documents, and has a bibliography and web links. |
| The Louisiana Purchase and the Exploration, Early History, and Building of the West: The history of the Louisiana Territory both before and after its purchase by the United States. Text of 1903 book by Ripley Hitchcock. |
| The Louisiana Purchase Bicentennial in Arkansas: Bicentennial events in Arkansas, with news and calendar. |
| The Louisiana Purchase: A Heritage Explored: A collection of primary sources and early published works, searchable by keyword. Accompanied by background essay and teachers' guide. A project of the Louisiana State University Libraries. |
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