The Iron Age tribes of later Somerset were the Dobunni in north Somerset, Durotriges in south Somerset and Dumnonii in west Somerset. The first and second produced coins, the finds of which allows their tribal areas to be suggested, but the latter did not. All three had a Celtic culture and language. However, Ptolemy stated that Bath was in the territory of the Belgae, but this may be a mistake. The Celtic gods were worshipped at the temple of Sulis at Bath and possibly the temple on Brean Down. Iron Age sites on the Quantock Hills, include major hill forts at Dowsborough and Ruborough, as well as smaller earthwork enclosures, such as Trendle Ring, Elworthy Barrows and Plainsfield Camp.