Historical Marker
What's the O-Line?
Historical marker location:
3001 Connecticut Ave NW, Smithsonian National Zoo, District of Columbia
( Marker is on Olmsted Walk, 0.2 miles west of North Road, on the left when traveling west.)
The District was the site of the first public monument to George Washington: The Washington Monument, which stands in the center of the National Mall, was built to honor the first U.S. president. It was completed in 1884, more than 50 years after construction began.