The document summarizes information about the Celts who lived in Britain and Ireland during the Iron Age. It describes how archaeologists have learned about Celtic culture from accidental discoveries like a body found with food still in its stomach. The Celts lived in roundhouses and hillfort settlements for protection. They farmed, traded goods, and the men trained as warriors, using weapons like swords, spears, and chariots. Celtic religion involved belief in gods and the otherworld, and druids held important religious and social roles. The coming of the Romans would drastically change Celtic life on the islands.