ens ▁Art ig as . ▁ ▁In ▁ 1 9 5 6 , ▁Mir ó ▁began ▁working ▁on ▁the ▁m ural ▁in ▁his ▁studio ▁in ▁Pal ma . ▁The ▁following ▁year ▁he ▁went ▁to ▁the ▁C aves ▁of ▁Alt am ira ▁in ▁with ▁L lor ens ▁Art ig as ▁inspired ▁to ▁carry ▁on ▁the ▁work , ▁by ▁seeing ▁" the ▁first ▁m ural ▁in ▁the ▁world ". ▁They ▁also ▁visit ▁the ▁Co leg i ata ▁y ▁Cla ust ro ▁de ▁Santa ▁Jul iana ▁and ▁the ▁roman es que ▁collection ▁of ▁the ▁Museum ▁of ▁Art ▁of ▁Catal onia , ▁the ▁current ▁M N AC . ▁ ▁Const ruction ▁ ▁Once ▁inspired , ▁Mir ó ▁moved ▁to ▁Gall ifa , ▁at ▁the ▁work shop ▁of ▁Art ig as , ▁to ▁proceed ▁to ▁prepare ▁the ▁tile ▁m ural . ▁It ▁took ▁ 3 5 ▁batch es , ▁ 2 5 ▁tons ▁of ▁wood , ▁ 4 ▁tons ▁of ▁sand stone ▁and ▁ 2 0 0 ▁kil os ▁of ▁en am el . ▁Once ▁finished , ▁the ▁pieces ▁were ▁transport ed ▁to ▁Paris . ▁Although ▁he ▁had ▁worked ▁in ▁large ▁formats , ▁he ▁had ▁never ▁done ▁cer am ics . ▁Bes ide ▁the ▁cer am ist ▁Jose p ▁L lor ens ▁Art ig as , ▁they ▁failed ▁to ▁find ▁technical ▁feas ibility ▁for ▁b aking ▁pot tery ▁in ▁a ▁way ▁that ▁allows ▁to ▁obtain ▁a ▁background ▁text ures ▁similar ▁to ▁the ▁paint ings ▁of ▁that ▁time . ▁It ▁was ▁decided ▁that ▁the ▁composition ▁was ▁on ▁the ▁subjects