Spiral - Triskelion
The spiral
The spiral is the primordial Celtic pattern, since the First & Second Iron Ages, that is to say from the second millennium BC. We find spirals decorating pottery & ceramics, stones and metals from this period.
Spirals are not necessarily three-branched. There are also one, two or four branches.
Over time, the forms became more complex as we can see them in illuminations of the Hiberno-Saxon manuscripts (Book of Kells, Lindisfarne Gospells, etc.).
The triskell
The triskell (in Breton), triskel or triskelion is a motif resulting from the simplification of the three-branched spiral, the origin of which can be traced back to the Iron Age, or even the Neolithic.
The revival of Celtic / Breton culture and the Neodruidic (modern paganism) movement popularized this symbol which can now be seen everywhere in Brittany and in the Celtic lands.
See also: What is Celtic art? (origins, influences, examples)
See also: On the use of symbols