Louisiana Purchase: References & Edit History
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The Editors of Encyclopaedia Britannica
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
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Diane Dillon
Diane Dillon is Director of Scholarly and Undergraduate Programs at the Newberry Library. Her research fields include American art, architecture, and visual culture; world’s fairs; the history of cartography; and Chicago’s history and culture. She has co-curated exhibitions on the 1909 Plan of Chicago, the history of cartography, and the 1933-34 Century of Progress International Exposition. In 2010 and 2011 she co-directed NEH summer seminars focused on mapping and art in the Americas. She has also taught undergraduates and graduate students at George Mason, Rice, Northwestern, Roosevelt, the University of Illinois at Chicago, and the School of the Art Institute of Chicago. Dillon holds a Ph.D. in the history of art from Yale University.
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Article History
| Type | Description | Contributor | Date |
|---|---|---|---|
| Modified link of Web site: Thomas Jefferson's Monticello - The Louisiana Purchase. | Sep 26, 2026 | ||
| Add new Web site: Council on Foreign Relations - The Louisiana Purchase. | Jul 28, 2026 | ||
| Anniversary information added. | Apr 25, 2026 | ||
| Cross-reference added. | Jan 30, 2026 | ||
| Add new Web site: Louisiana State Museums - The Louisiana Purchase. | Nov 28, 2025 | ||
| Add new Web site: ABC listen - Nightlife - This Week in History: The Louisiana Purchase. | Sep 22, 2025 | ||
| Add new Web site: National Park Service History Electronic Library and Archive - The Louisiana Purchase (PDF). | Jul 29, 2025 | ||
| Add new Web site: United States Census Bureau - History and the Census: The 1803 Louisiana Purchase. | Jun 20, 2025 | ||
| Add new Web site: National Archives - Louisiana Purchase Treaty (1803). | Mar 27, 2025 | ||
| Questions and answers added. | Feb 18, 2025 | ||
| Add new Web site: World History Encyclopedia - Louisiana Purchase. | Oct 22, 2024 | ||
| Add new Web site: NCpedia - ANCHOR - The Louisiana Purchase. | Sep 10, 2024 | ||
| Add new Web site: Missouri Encyclopedia - Louisiana Purchase and Missouri. | Jul 30, 2024 | ||
| Add new Web site: Encyclopedia Virginia - Louisiana Purchase. | Jun 18, 2024 | ||
| Add new Web site: CALS Encyclopedia of Arkansas - Louisiana Purchase. | Mar 29, 2024 | ||
| Add new Web site: University of Maryland, Baltimore County - The Louisiana Purchase: Real Estate Deal of the Century? | Oct 17, 2023 | ||
| Add new Web site: GlobalSecurity.org - 1800-1803 - Napoleon's Louisiana Purchase. | Aug 10, 2023 | ||
| Add new Web site: Khan Academy - The Louisiana Purchase and its exploration. | Jun 29, 2023 | ||
| Add new Web site: Library of Congress - The Louisiana Purchase. | Mar 29, 2023 | ||
| Add new Web site: Thomas Jefferson's Monticello - The Louisiana Purchase. | Oct 06, 2022 | ||
| Corrected display issue. | Feb 12, 2021 | ||
| Corrected display issue. | Jul 24, 2019 | ||
| Add new Web site: United States History for Kids - Louisiana Purchase, 1803. | Jan 30, 2019 | ||
| Media added. | Feb 17, 2017 | ||
| Add new Web site: Mr.Nussbaum - Louisiana Purchase for Kids. | Dec 16, 2016 | ||
| Add new Web site: HistoryNet - Louisiana Purchase. | Jun 28, 2016 | ||
| Add new Web site: Thomas Jefferson's Monticello - Louisiana Purchase. | Jun 28, 2016 | ||
| Replaced video. | Apr 01, 2014 | ||
| Add new Web site: Social Studies for Kids - The Louisiana Purchase. | Jan 30, 2013 | ||
| Add new Web site: Kansapedia - Kansas State Historical Society - Louisiana Purchase. | Jan 30, 2013 | ||
| Add new Web site: UShistory.org - Westward Expansion: The Louisiana Purchase. | Jan 30, 2013 | ||
| Add new Web site: United States History - Louisiana Purchase. | Jan 29, 2013 | ||
| Add new Web site: U.S. Department of State - Office of the Historian - Louisiana Purchase. | Jan 29, 2013 | ||
| Added a 1718 map of the Louisiana area. | Jun 08, 2012 | ||
| Article restructured. | Aug 21, 2009 | ||
| Added new Web site: Enchanted Learning - The Louisiana Purchase. | Apr 13, 2009 | ||
| Added new Web site: How Stuff Works - History - Louisiana Purchase. | Nov 06, 2008 | ||
| Added new Web site: How Stuff Works - History - How the Louisiana Purchase Worked. | Nov 06, 2008 | ||
| Article revised and updated. | May 10, 2007 | ||
| Article revised. | Mar 28, 2003 | ||
| Article added to new online database. | Jul 20, 1998 |
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