▁Font eno y ▁in ▁Paris , ▁but ▁afterwards ▁were ▁en closed ▁in ▁a ▁building ▁that ▁was ▁constructed ▁in ▁order ▁to ▁protect ▁them ▁from ▁damage ▁caused ▁by ▁acid ▁rain . ▁ ▁History ▁ ▁Joan ▁Mir ó ▁and ▁Jose p ▁L lor ens ▁Art ig as ▁met ▁in ▁ 1 9 1 0 ▁at ▁the ▁school ▁of ▁art ▁of ▁the ▁artist ▁Frances c ▁Gal í ▁( 1 8 8 0 – 1 9 6 5 ), ▁in ▁Barcelona . ▁Since ▁the ▁ 1 9 4 0 s , ▁Mir ó ▁and ▁Jose p ▁L lor ens ▁Art ig as ▁started ▁an ▁art istic ▁du o ▁that ▁spawn ed ▁objects ▁and ▁large ▁cer am ic ▁mur als ▁such ▁as ▁one ▁at ▁the ▁Un es co ▁building ▁in ▁Paris ▁or ▁the ▁cer am ic ▁wall ▁of ▁the ▁Barcelona ▁Airport . ▁These ▁works ▁f used ▁Mir ó ▁lex icon ▁with ▁the ▁essential ▁qual ities ▁of ▁the ▁arts ▁of ▁earth ▁and ▁fire . ▁ ▁In ▁ 1 9 5 5 ▁Joan ▁Mir ó ▁was ▁contact ed ▁by ▁the ▁heads ▁of ▁UN ES CO ▁to ▁ask ▁if ▁he ▁want ▁to ▁take ▁part ▁of ▁the ▁team ▁of ▁artists ▁that ▁decor ated ▁the ▁future ▁headquarters ▁of ▁the ▁institution ▁that ▁is ▁located ▁in ▁Paris . ▁Once ▁agreed , ▁they ▁granted ▁the ▁exterior ▁walls ▁of ▁the ▁building ▁con ferences , ▁two ▁per pend icular ▁walls ▁of ▁three ▁meters ▁high ▁and ▁seven ▁meters ▁long ▁and ▁fifteen , ▁respectively . ▁Mir ó ▁proposed ▁to ▁make ▁a ▁cer am ic ▁m ural ▁in ▁collaboration ▁with ▁L lor