▁to ▁perform ▁as ▁a ▁piano ▁virt u oso ▁and ▁to ▁write ▁sym ph onic ▁compos itions , ▁chamber ▁music , ▁and ▁piano ▁works ▁as ▁he ▁master ed ▁conduct ing . ▁ ▁In ▁late ▁November ▁ 1 9 6 0 , ▁the ▁ 1 1 - year - old ▁appeared ▁with ▁the ▁Ant werp ▁Phil harm onic ▁and ▁was ▁ha iled ▁as ▁" the ▁greatest ▁child ▁pro dig y ▁since ▁Moz art ". ▁ ▁On ▁December ▁ 1 , ▁ 1 9 6 0 , ▁he ▁gave ▁a ▁royal ▁command ▁performance ▁at ▁the ▁Pal ais ▁des ▁Be aux - Ar ts ▁in ▁Br uss els ▁before ▁the ▁Dow ager ▁Queen ▁Elisabeth ▁of ▁Belg ium , ▁appearing ▁in ▁his ▁multiple ▁roles ▁as ▁pian ist , ▁conduct or , ▁and ▁composer . ▁ ▁The ▁live ▁recording ▁of ▁this ▁concert , ▁released ▁as ▁a ▁ 2 - LP ▁set ▁called ▁" Command ▁Performance ", ▁contains ▁his ▁own ▁P iano ▁Con cer to ▁No ▁ 2 , ▁Be eth oven ▁Sym phony ▁No ▁ 8 , ▁Be eth oven ▁ 3 rd ▁P iano ▁Con cer to , ▁Ch op in ▁Et ude ▁Op . ▁ 2 5 ▁No ▁ 1 2 , ▁and ▁Rach man ino ff ▁P rel ude ▁in ▁C - sharp ▁Minor . ▁ ▁He ▁accepted ▁an ▁inv itation ▁from ▁Queen ▁Elisabeth ▁to ▁study ▁at ▁the ▁Br uss els ▁Conserv atory , ▁where ▁his ▁teachers ▁included ▁Edu ardo ▁del ▁P ue yo ▁and ▁Jean ▁Abs il . ▁In ▁ 1 9 6 5 ,