Consider: 13 Original Colonies: 13 Signers of the Declaration of Independence: 13 Stripes on our flag: On the Dollar Bill- 13 steps on the Pyramid: 13 letters in "Annuit Coeptis" (above the pyramid) 13 letters in "E Pluribus Unum': 13 stars above the Eagle: 13 bars on that shield: 13 leaves on the olive branch: 13 fruits and 13 arrows.
but, I have only given you 11 facts so I will make up two more (the above are true) -
13 eye lashes on the eye and in the old days if you counterfited the dollar bill you got 13 years in prison. OK I made the last two up but I will bet that most never even knew the words "Annuit Coeptis" were even on the dollar bill. Look it over. It is interesting.