The document summarizes various aspects of Celtic culture including their languages, art, warfare, Christianity, society, clothing, and Roman influence. The Celtic languages originated in Europe and spread across the continent. Celtic art featured intricate geometric patterns rather than figurative images. Warfare was a regular part of Celtic societies and involved raiding rivals for economic gain. Christianity arrived in unconquered Celtic lands in the 5th century AD and led to a medieval renaissance in Celtic art. Society was divided into classes including warriors and druids. Clothing included tunics and pants as depicted in artwork. Roman rule weakened druidism and led to the adoption of some Roman religious practices.