Celts are a mixture of various individuals and countries whom settled in a large part of Europe between your Iberian Peninsula and Britannia. They'd an homogeneous faith, but constantly were politically divided. The higher known cultural group could be the Gauls. Fierce and hard-fighting, in 386 B.C. the Senones Gauls led by Brennus put Rome under siege and occupied it. These were later subjugated by the Romans.
