Benjamin Banneker was born on November 9, 1731, in Ellicott's Mills, Maryland. A free black man who owned a farm near Baltimore, Banneker was largely self-educated in astronomy and mathematics. He was later called upon to assist in the surveying of territory for the construction of the nation's capital. He also became an active writer of almanacs and exchanged letters with Thomas Jefferson, politely challenging him to do what he could to ensure racial equality. Banneker died on October 9, 1806.

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