When did Celtic art start?

Celtic art began to emerge around the 5th century BCE, during the Iron Age, and it flourished until the Roman conquest of Celtic territories around the 1st century CE. The art is characterized by intricate designs, patterns, and motifs, often featuring spirals, knots, and animal forms. It is particularly associated with the La Tène culture, which spread across various regions of Europe inhabited by Celtic tribes. This artistic tradition continued to evolve, influencing and integrating with early medieval art, especially in insular contexts like Ireland and Britain.