8 ▁AD ), ▁who ▁tells ▁us ▁of ▁an ▁ Ἐ λ ο υ η τ ί ω ν ▁ ἔ ρ η μ ος ▁( i . e . ▁" Hel vet ic ▁desert ed ▁lands ") ▁north ▁of ▁the ▁Rh ine . ▁T ac it us ▁knows ▁that ▁the ▁Hel vet ians ▁once ▁settled ▁in ▁the ▁sw ath ▁between ▁Rh ine , ▁Main , ▁and ▁the ▁Her c yn ian ▁forest . ▁The ▁abandon ment ▁of ▁this ▁northern ▁territory ▁is ▁now ▁usually ▁placed ▁in ▁the ▁late ▁ 2 nd ▁century ▁BC , ▁around ▁the ▁time ▁of ▁the ▁first ▁German ic ▁inc urs ions ▁into ▁the ▁Roman ▁world , ▁when ▁the ▁Tig ur ini ▁and ▁Toy gen oi / T out ono i ▁are ▁mentioned ▁as ▁participants ▁in ▁the ▁great ▁ra ids . ▁ ▁At ▁the ▁later ▁V icus ▁Tur icum , ▁probably ▁in ▁the ▁first ▁ 1 st ▁century ▁BC ▁or ▁even ▁much ▁earlier , ▁the ▁Cel ts ▁settled ▁at ▁the ▁L inden hof ▁O pp id ium . ▁In ▁ 1 8 9 0 , ▁so - called ▁Pot in ▁l umps ▁were ▁found , ▁whose ▁largest ▁weights ▁ ▁at ▁the ▁Pre histor ic ▁p ile ▁dwell ing ▁settlement ▁Al pen qu ai ▁in ▁Zürich , ▁Switzerland . ▁The ▁pieces ▁consist ▁of ▁a ▁large ▁number ▁of ▁f used ▁C elt ic ▁co ins , ▁which ▁are ▁mixed ▁with ▁char co al ▁rem n ants . ▁Some ▁of ▁the ▁ 1 8 , 0 0 0 ▁co ins ▁origin ate ▁from ▁the