This symbol instantly identifies as a Celtic symbol due to the knot styling. Celtic knots come in a huge rage of designs, but what is different with this one? There is not the identity of infinite cycles. All the rings are independent but yet interlocking, giving the illusion of the knot. However the main piece of importance with this symbol is that 5th circle.
The number 5 plays a huge role amongst different cultures and they all have the loose connection of a "higher being", the fifth element.