The Triskelion or Triskele
A triskelion or triskeles is an ancient motif consisting of a triple spiral exhibiting rotational symmetry or other patterns in triplicate that emanate from a common center. The spiral design can be based on interlocking Archimedean spirals, or represent three bent human legs.
It is found in artefacts of the European Neolithic and Bronze Age with continuation into the Iron Age especially in the context of the La Tène culture and related Celtic traditions.
The actual triskeles symbol of three human legs is found in Greek antiquity.
5,000 year-old triskelion on an orthostat at Newgrange