A UFO over Washington DC

What is the Illuminati?

The Order of the Illuminati, a secret society founded in Bavaria in the late 18th century by Adam Weishaupt to advocate for secularism.

What is Freemasonry?

A different, less secret society has been known to use the eye-in-a-triangle symbol: Freemasonry.
“Freemasonry is one of the oldest fraternal organizations in the world,” the Grand Lodge of Ohio explains on its website. “It unites men of good character who, though of different religious, ethnic or social backgrounds, share a belief in the fatherhood of God and the brotherhood of mankind.”

Source : https://thehill.com/homenews/nexstar_media_wire/4395666-why-is-there-a-floating-eye-on-the-1-bill/