▁Cas als ▁visited ▁the ▁island ▁to ▁see ▁his ▁family ▁and ▁to ▁discover ▁the ▁land ▁where ▁his ▁mother ▁was ▁born . ▁So on ▁after , ▁he ▁would ▁dedic ate ▁most ▁of ▁his ▁work ▁to ▁fost er ▁classical ▁music ▁in ▁Puerto ▁Rico . ▁In ▁ 1 9 5 7 , ▁he ▁organized ▁the ▁first ▁annual ▁Cas als ▁Festival , ▁where ▁he ▁invited ▁classical ▁mus icians ▁to ▁perform ▁several ▁concert s ▁to ▁Puerto ▁Ric ans ▁and ▁tour ists ▁al ike . ▁It ▁was ▁during ▁this ▁multi - week ▁festival ▁that ▁state ▁legisl ator ▁Ern esto ▁Ram os ▁Anton ini ▁presented ▁a ▁bill ▁which ▁would ▁create ▁the ▁Puerto ▁Rico ▁Sym phony ▁Orchestra , ▁receiving ▁much ▁pra ise ▁and ▁support ▁from ▁both ▁the ▁public ▁and ▁other ▁state ▁legisl ators . ▁After ▁the ▁law ▁was ▁signed ▁by ▁then ▁Governor ▁of ▁Puerto ▁Rico ▁Luis ▁Mu ñ oz ▁Mar ín , ▁the ▁task ▁of ▁organ izing ▁the ▁or chestra ▁was ▁given ▁to ▁the ▁same ▁group ▁which ▁organized ▁the ▁Cas als ▁Festival . ▁The ▁first ▁live ▁concert ▁was ▁performed ▁on ▁November ▁ 6 , ▁ 1 9 5 8 ▁in ▁May ag ü ez , ▁h omet own ▁of ▁Don ▁Pablo ▁Cas als ’ s ▁mother . ▁ ▁The ▁PR SO ▁has ▁hosted ▁various ▁artists , ▁including ▁Pl á cido ▁Dom ingo , ▁Luci ano ▁Pav ar otti , ▁Just ino ▁Dí az , ▁K iri ▁Te ▁Kan awa , ▁and ▁A lic ia ▁de ▁Lar ro cha , ▁among ▁others , ▁and ▁has ▁performed ▁in ▁various ▁Central ▁and ▁South ▁American ▁countries