Decades: 1750s 1760s 1770s 1780s 1790s - 1800s - 1810s 1820s 1830s 1840s 1850s
Years: 1801 1802 1803 1804 1805 - 1806 - 1807 1808 1809 1810 1811
January 8 - Cape Colony becomes a British colony
January 10 - Dutch in Cape Town surrender to the British
January 19 - The United Kingdom occupies the Cape of Good Hope
March 23 - After traveling through the Louisiana Purchase and reaching the Pacific Ocean, explorers Lewis and Clark and their "Corps of Discovery" begin their journey home.
March 29 - The Great National Pike, better known as the Cumberland Road, becomes the first United States federal highway.
July 15 - Pike expedition: Near St. Louis, Missouri, United States Army Lieutenant Zebulon Pike leads an expedition from Fort Belle Fountaine to explore the west.
August 6 - Francis I, the last Holy Roman Emperor, abdicates, thus ending the Holy Roman Empire.
October 14 - Battle of Jena-Auerstädt
November 15 - Pike expedition: During his second exploratory expedition, Lieutenant Zebulon Pike sees a distant mountain peak while near the Colorado foothills of the Rocky Mountains (it was later named Pikes Peak in his honor).
Holy Roman Empire dissolved by Emperor Francis II.
March 6 - Elizabeth Barrett Browning, poet (+ 1861)
March 12 - Jane Pierce, First Lady of the United States
March 21 - Benito Juarez, Mexican statesman and folk hero (+ 1872)
April 9 - Isambard Kingdom Brunel, British engineer.
May 20 - John Stuart Mill, British philosopher.
December 11 - Otto Wilhelm Hermann von Abich. German geologist
January 23 - William Pitt the Younger, Prime Minister of the United Kingdom
February 11 - Vicente Martin y Soler, composer.\n