▁the ▁festival ▁programme ▁is ▁historical ▁performance ▁– ▁present ing ▁works ▁as ▁they ▁were ▁originally ▁heard , ▁on ▁period ▁pian os ▁in ▁the ▁possession ▁of ▁the ▁F ry der yk ▁Ch op in ▁Institute : ▁an ▁Er ard ▁from ▁ 1 8 4 9 , ▁a ▁P ley el ▁from ▁ 1 8 4 6 ▁and ▁a ▁Graf ▁( a ▁copy ▁of ▁an ▁instrument ▁from ▁c . ▁ 1 8 1 9 ). ▁ ▁The ▁festival ▁is ▁organ ised ▁in ▁collaboration ▁with ▁the ▁Wars aw ▁Phil harm onic , ▁Te atr ▁Wiel ki ▁– ▁Polish ▁National ▁Opera ▁and ▁Polish ▁Radio ▁II . ▁ ▁Each ▁year , ▁the ▁invited ▁guests ▁include ▁perform ers ▁from ▁around ▁the ▁world , ▁many ▁of ▁whom ▁have ▁a ▁special ▁connection ▁with ▁the ▁festival , ▁including ▁Mart a ▁Ar ger ich , ▁Nelson ▁Go erner , ▁D ina ▁Y off e , ▁Tob ias ▁Koch , ▁I vo ▁P og or el ich , ▁G arr ick ▁O hl sson ▁and ▁Jan ▁Lis ieck i . ▁The ▁festival ▁also ▁features ▁performances ▁by ▁final ists ▁and ▁other ▁participants ▁in ▁the ▁Ch op in ▁Compet ition . ▁ ▁References ▁▁ ▁F ry der yk ▁Ch op in ▁Institute ▁website , ▁accessed ▁ 2 4 ▁June ▁ 2 0 1 6 ▁ ▁Category : 2 0 0 5 ▁establish ments ▁in ▁Poland ▁Category : Fr éd éric ▁Ch op in ▁Category : Class ical ▁music ▁festiv als ▁in ▁Poland <0x0A> </s> ▁Aleks ander ▁K ow al ski ▁or ▁K ow al sky ▁may ▁refer