Major Pierre L'Enfant , who some claim was a Freemason but there is no evidence to the fact that he was , was commissioned by George Washinton to design the city of Washington . As for the forming any symbols in the street plans , if any show up it is simply a matter of consequence or fanciful thinking . Take for example the "inverted pentegram" , it had NO particular meaning in 1792 and was not considered evil at the time . It was not until around 1861 that it was considered evil because of the writings of Eliphas Levi , which is quite a few years after the layout of Washington DC was completed . And these lines were unfinished to boot . If a Mason or Masons wanted to include an inverted pentegram in the street plan , wouldn't they have had the forsight to make it a complete pentegram ?