Pierre Charles L'Enfant was the original designer of the Federal City.
More information here on the plan of the city:
The Plan of the City of Washington (L’Enfant Plan; L’Enfant-McMillan Plan) https://historicsites.dcpreservation.org/items/show/478
https://www.amazon.com/Sacred-Geometry-Washington-D-C-Integrity/dp/0954723074
Please note in the McMillan Plan design of 1901, the Owl is present, see left side of image.
https://www.cnu.org/publicsquare/2018/02/21/l%E2%80%99enfant%E2%80%99s-sacred-design-washington-dc
So basically the perimeter conforms to McMillan then? Do you have any insight about him?
Should have written, owl is on the right side of the image.
https://www.cnu.org/publicsquare/2018/02/21/l%E2%80%99enfant%E2%80%99s-sacred-design-washington-dc