itional ▁ar che ological ▁evidence ▁indicates ▁that ▁by ▁the ▁ 2 nd ▁Iron ▁Age ▁they ▁came ▁under ▁the ▁influence ▁of ▁the ▁Cel ti ber ians . ▁ ▁By ▁the ▁ 1 st ▁century ▁BC ▁they ▁were ▁organized ▁into ▁a ▁feder ation ▁of ▁autonom ous ▁mountain - top ▁fort ified ▁towns ▁( C iv it ates ) ▁on ▁the ▁mountain ▁ranges ▁of ▁the ▁upper ▁E bro , ▁protected ▁by ▁st out ▁ad obe ▁walls ▁of ▁the ▁" Num antine " ▁type . ▁ ▁More ▁ar che ological ▁evidence ▁have ▁been ▁found , ▁emphas izing ▁their ▁cel ti ber ian ▁culture , ▁such ▁as ▁the ▁hospital ity ▁t ess era e . ▁These ▁consisted ▁on ▁a ▁zo omorphic - sh aped ▁metal ▁table t ▁with ▁an ▁ins cription ▁using ▁a ▁variant ▁of ▁the ▁N ort he astern ▁I ber ian ▁script ▁( also ▁known ▁as ▁Cel ti ber ian ▁script ), ▁written ▁in ▁a ▁form ▁of ▁cel ti ber ian ▁language . ▁ ▁History ▁Ar ound ▁the ▁beginning ▁of ▁the ▁ 4 th ▁century ▁BC ▁the ▁Aut rig ones ▁migr ated ▁to ▁the ▁Pen ins ula ▁and ▁over run ▁the ▁entire ▁area ▁corresponding ▁today ▁to ▁the ▁modern ▁provinces ▁of ▁Cant ab ria ▁and ▁Burg os , ▁which ▁eventually ▁became ▁known ▁as ▁Aut rig onia ▁or ▁Aust rig onia . ▁ ▁By ▁the ▁mid - 4 th ▁century ▁BC ▁the ▁Aut rig ones ▁reached ▁the ▁P is uer ga ▁valley ▁where ▁they ▁established ▁their ▁capital ▁Aut rac a ▁or ▁Aust rac a , ▁located ▁at ▁the