An omphalos, also known as a Baetylus, is an ancient sacred stone artifact. The word omphalos means “navel” in Greek (compare the name of Queen Omphale). According to Greek mythology, Zeus dispatched two eagles to fly across the globe and meet at the “navel” of the globe. Omphalos stones were placed in numerous locations across the Mediterranean Sea to mark this point, the most famous of which was at the oracle in Delphi.