chestra , ▁from ▁ 1 9 6 0 ▁to ▁ 1 9 7 7 . ▁ ▁Sub sequ ent ▁chief ▁conduct ors ▁have ▁been ▁Gün ther ▁Her big , ▁Cla us ▁Peter ▁Flor , ▁Michael ▁Sch ø n wand t ▁( 1 9 9 2 – 1 9 9 8 ), ▁El ia hu ▁In bal ▁( 2 0 0 1 – 2 0 0 6 ), ▁and ▁L oth ar ▁Zag rose k . ▁ ▁In ▁February ▁ 2 0 1 1 , ▁the ▁or chestra ▁announced ▁the ▁appointment ▁of ▁I ván ▁Fischer ▁as ▁its ▁e ighth ▁principal ▁conduct or , ▁effective ▁with ▁the ▁ 2 0 1 2 - 2 0 1 3 ▁season , ▁with ▁an ▁initial ▁contract ▁of ▁ 3 ▁years . ▁ ▁In ▁October ▁ 2 0 1 6 , ▁the ▁or chestra ▁announced ▁that ▁Fischer ▁is ▁to ▁stand ▁down ▁as ▁its ▁principal ▁conduct or ▁after ▁the ▁ 2 0 1 7 - 2 0 1 8 ▁season . ▁ ▁In ▁November ▁ 2 0 1 7 , ▁the ▁or chestra ▁announced ▁the ▁appointment ▁of ▁Christoph ▁E schen bach ▁as ▁its ▁next ▁chief ▁conduct or , ▁effective ▁with ▁the ▁ 2 0 1 9 - 2 0 2 0 ▁season , ▁with ▁an ▁initial ▁contract ▁of ▁ 3 ▁years . ▁ ▁Princi pal ▁guest ▁conduct ors ▁of ▁the ▁or chestra ▁have ▁included ▁D mit ri ▁Kit ay en ko , ▁the ▁current ▁holder ▁of ▁the ▁post . ▁ ▁With ▁the ▁ 2 0 1 7 - 2 0