The description on this image from Flickr says it’s a proposed plan for public buildings on the Mall near the Capitol.

Washington DC proposed plan of public buildings. Copy of drawing.
Source: Flickr user medicalmuseum
The description on this image from Flickr says it’s a proposed plan for public buildings on the Mall near the Capitol.
Washington DC proposed plan of public buildings. Copy of drawing.
Source: Flickr user medicalmuseum