The Swastika has been an ancient symbol to many ancient cultures for thousands of years as well as an important symbol in Buddhism and Hinduism. In the Celtic tradition it’s believed to be a symbol connected to the sun and solar activities, also being labelled a ‘Sun cross’ (almost like a sun with rays coming out of it). It’s seen here on the Battersea shield and carved on stones in places such as Ilkley moor:
Celtic Wheels are seen as a symbol associated with the Celtic God of Thunder, Taranis. It’s also believed that the Celtic wheel is the inspiration for the later (different) sun cross and Celtic cross.