 Benjamin Banneker

Benjamin Banneker (November 9, 1731October 19, 1806) was a free African-American almanac author, surveyor, landowner and farmer who had knowledge of mathematics and natural history.Born in Baltimore County, Maryland, to a free African-American woman and a former slave, Banneker had little or no formal education and was largely self-taught, and became known as member of a group led by Major Andrew Ellicott that surveyed the original borders of the District of Columbia, the federal capital district of the United States.