The structure in the ring is known as the Vesica Pisces or the first day of creation. It is a symbol of the infinite consciousness which is in all of us, learning and experiencing itself through creation. This simple structure consists of two crossed circles, by which one can extract many geometrical and mathematical laws that represent our reality.
It is an ancient symbol of knowledge, wisdom and love.
The two winged images are called the Cherubim and represent the male and female and the perfect balance between the two forces composing reality. The Cherubim were found upon sacred artifacts in ancient Egypt. The Vesica Pisces sketches were also found in ancient Egypt with ancient Greek writings which indicate that it was probably made by disciples of Pythagoras the ancient philosopher who used these mathematical/geometrical structures as the building blocks of reality, harmony and music.