What is the name of the eye on the back of a United States one-dollar bill?

The Eye of Providence floats on top of the pyramid on the back of the one-dollar bill. The pyramid and the eye are a part of the Great Seal of the United States. Franklin D. Roosevelt, the 32nd US President, authorized it to be added to the $1 currency in 1935.

The phrases surrounding the pyramid are in Latin and translate to “Providence Has Favored Our Undertakings” and “A New Order of the Ages,” referring to the Founding Fathers establishing a new government. According to researchers, the eye is supposed to represent the eye of God watching over the new nation.