Andrew Ellicott
The master surveyor who physically etched the plans for Washington, D.C., onto the American landscape.
1754–1820 (age 66)·American surveyor·Birthday: January 24
Biography
Andrew Ellicott was the man who turned grand architectural visions into tangible lines on the ground. A skilled mathematician and surveyor from a prominent Quaker family, he was entrusted with some of the young United States' most critical mapping projects. After assisting with the survey of the new federal city's boundaries, he was tasked with executing Pierre L'Enfant's ambitious plan for Washington after L'Enfant's contentious departure. For years, Ellicott and his team, including a free Black astronomer named Benjamin Banneker, painstakingly laid out the city's avenues and lots, making crucial adjustments that defined the capital's final form. His expertise extended to the frontier, where he surveyed the boundary between the U.S. and Spanish Florida and taught Meriwether Lewis the celestial navigation skills vital for the Corps of Discovery. Ellicott's precise work literally drew the map of American expansion.
#1 When Andrew Was Born
The biggest hits of 1754
Andrew's Life & Times
The world at every milestone
1754Born
1759Started school
1767Became a teenager
1770Could drive
1772Could vote
1775Turned 21
1784Turned 30
1794Turned 40
1804Turned 50
1814Turned 60
1820Died at 66
Key Achievements
- Surveyed and finalized the boundary lines of the District of Columbia.
- Implemented and revised Pierre L'Enfant's plan, physically laying out the streets and lots of Washington, D.C.
- Trained Meriwether Lewis in advanced surveying and celestial observation techniques for the Lewis and Clark Expedition.
Did You Know?
He taught mathematics at the United States Military Academy at West Point.
His brother Joseph founded the town of Ellicott City, Maryland.
He used a zenith sector, a precision astronomical instrument, to establish accurate latitudes and longitudes for his surveys.
“The city's lines must be laid with a precision that will last for centuries.”
