▁of ▁western ▁Europe . ▁ ▁Bron ze ▁Age ▁Bron ze ▁Age ▁cult ures ▁developed ▁beginning ▁  1 8 0 0 ▁BC , ▁when ▁the ▁civil ization ▁of ▁Los ▁Mill ares ▁was ▁followed ▁by ▁that ▁of ▁El ▁Ar gar . ▁From ▁this ▁centre , ▁bronze ▁technology ▁spread ▁to ▁other ▁cult ures ▁like ▁the ▁Bron ze ▁of ▁Lev ante , ▁South - West ern ▁I ber ian ▁Bron ze ▁and ▁Las ▁C og ot as . ▁ ▁In ▁the ▁Late ▁Bron ze ▁Age , ▁the ▁urban ▁civil isation ▁of ▁T art ess os ▁developed ▁in ▁the ▁area ▁of ▁modern ▁western ▁And alus ia , ▁character ized ▁by ▁Pho en ician ▁influence ▁and ▁using ▁the ▁South west ▁Pale oh is pan ic ▁script ▁for ▁its ▁T art ess ian ▁language , ▁not ▁related ▁to ▁the ▁I ber ian ▁language . ▁ ▁Early ▁in ▁the ▁first ▁mill en ni um ▁BC , ▁several ▁waves ▁of ▁Pre - C el ts ▁and ▁Cel ts ▁migr ated ▁from ▁Central ▁Europe , ▁thus ▁partially ▁changing ▁the ▁pen ins ula ' s ▁eth nic ▁landscape ▁to ▁Ind o - Europe an - spe aking ▁in ▁its ▁northern ▁and ▁western ▁regions . ▁ ▁In ▁North western ▁I ber ia ▁( mod ern ▁Northern ▁Portugal , ▁Ast ur ias ▁and ▁Gal icia ), ▁a ▁C elt ic ▁culture ▁developed , ▁the ▁Castro ▁culture , ▁with ▁a ▁large ▁number ▁of ▁hill ▁for ts ▁and ▁some ▁fort ified ▁cities . ▁ ▁Pro to - history ▁ ▁By ▁the ▁Iron ▁Age , ▁starting ▁in ▁the ▁