The Great Seal of the United States contains ten features of thirteen. The first appearance of the number thirteen, on the Great Seal, is in the constellation of stars depicted above the head of the eagle on the obverse side. Officially, the number thirteen represents the thirteen colonies. Our forefathers were very conscious of the number thirteen.
Although the front of the seal is mysterious enough, the reverse side is even more unusual. The most striking part of the reverse of the seal is the combination of an all-seeing eye (Eye of Horus) and a pyramid. Horus was the son of Osiris and Isis. One of his most common forms is as the god of the rising sun and the symbol and personification of Light.