omphalos is the navel, the center of our universe....
An omphalos is a religious stone artifact in the ancient world. In Greek, the word omphalos means "navel". Most accounts locate the Omphalos in the temple adyton near the Pythia. The stone itself (which may have been a copy) has a carving of a knotted net covering the stone, and has a hollow centre, widening to the base of the stone.
According to the ancient Greeks, Zeus sent out two eagles to fly across the world to meet at its center, the "navel" of the world. Omphalos stones used to denote this point were erected in several areas surrounding the Mediterranean Sea, the most famous of those was at the oracle in Delphi.