▁the ▁Paul ▁M ist ral ▁public ▁park . ▁It ▁is ▁the ▁first ▁tower ▁built ▁in ▁rein for ced ▁concrete ▁in ▁Europe . ▁In ▁ 1 9 9 8 , ▁it ▁was ▁officially ▁declared ▁to ▁be ▁a ▁national ▁her itage ▁site . ▁It ▁was ▁built ▁for ▁the ▁International ▁Ex hib ition ▁of ▁H yd rop ower ▁and ▁Tour ism ▁where ▁it ▁was ▁the ▁orientation ▁tower ▁and ▁the ▁symbol ▁of ▁the ▁exhibition . ▁Now ad ays , ▁it ▁is ▁the ▁last ▁vest ige ▁of ▁this ▁exhibition . ▁ ▁Architecture ▁Per ret ▁tower ▁stands ▁ ▁tall . ▁Its ▁section ▁is ▁oct ag onal . ▁Its ▁found ations ▁are ▁ ▁long , ▁made ▁of ▁ 7 2 ▁vertical ▁st akes ▁in ▁rein for ced ▁concrete ▁gathered ▁at ▁the ▁top ▁by ▁a ▁sl ab ▁and ▁placed ▁on ▁a ▁hard ▁gra vel ▁layer . ▁The ▁framework ▁is ▁comp ound ▁of ▁eight ▁vertical ▁pol es . ▁The ▁tower ▁diameter ▁is ▁ ▁at ▁the ▁base . ▁The ▁last ▁floor ▁is ▁reach able ▁by ▁hel ical ▁st airs ▁( visible ▁in ▁the ▁top ▁open work ▁part ) ▁or ▁by ▁lift . ▁ ▁August e ▁Per ret , ▁with ▁the ▁assistance ▁of ▁Marie ▁D orm oy , ▁art ▁critic , ▁came ▁to ▁Gren o ble ▁for ▁two ▁years , ▁to ▁do ▁con ferences ▁and ▁meet ▁political ▁and ▁art istic ▁circles ▁in ▁order ▁to ▁promote ▁a ▁" re in for ced ▁concrete ▁order "; ▁a ▁reference ▁to ▁the ▁ant ique ▁orders . ▁ ▁Made ▁of ▁the ▁first ▁rein for ced ▁concrete , ▁the ▁tower