- William Wyatt Bibb to Mary Freeman.
In 1803, the Louisiana Purchase was made, doubling the size of the U.S. Ohio was admitted as the 17th state. The elements Rhodium, Palladium, Osmium, Iridium, and Cerium were identified.
Notable births in 1803 included writer Ralph Waldo Emerson, inventor John Ericsson, and physicist Christian Doppler. Notable deaths included brewer Arthur Guinness and founding father Samuel Adams.
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