ire v . ▁ ▁See ▁also ▁ ▁The ▁Dest ruction ▁of ▁S enn acher ib ▁ ▁Category : Ch oral ▁compos itions ▁Category : 1 8 6 6 ▁compos itions ▁Category : Com pos itions ▁by ▁Mod est ▁M uss org sky <0x0A> </s> ▁Johann ▁N ath ana el ▁Lie ber k ü hn ▁( 5 ▁September ▁ 1 7 1 1 , ▁Berlin ▁– ▁ 7 ▁October ▁ 1 7 5 6 , ▁Berlin ) ▁was ▁a ▁German ▁phys ician . ▁His ▁middle ▁name ▁is ▁sometimes ▁miss pel led ▁Nathan iel . ▁ ▁Lie ber k ü hn ▁studied ▁the ology ▁initially , ▁and ▁then ▁moved ▁to ▁physics , ▁in ▁particular ▁mechan ics . ▁It ▁was ▁only ▁after ▁this ▁that ▁he ▁comm enced ▁medicine . ▁In ▁ 1 7 3 9 ▁he ▁moved ▁to ▁Le iden , ▁in ▁the ▁Netherlands , ▁and ▁then ▁a ▁year ▁later ▁to ▁London ▁and ▁Paris . ▁Following ▁this ▁he ▁returned ▁to ▁Berlin ▁as ▁a ▁member ▁of ▁the ▁Colleg ium ▁med ico - ch ir urg icum , ▁ ▁the ▁body ▁charged ▁with ▁impro ving ▁the ▁teaching ▁and ▁science ▁of ▁medicine ▁in ▁the ▁Holy ▁Roman ▁Empire , ▁making ▁mathematical ▁and ▁optical ▁instruments ▁and ▁working ▁as ▁a ▁professor ▁and ▁medical ▁doctor . ▁▁ ▁Besides ▁his ▁phys i ological ▁work , ▁Lie ber k ü hn ▁was ▁most ▁known ▁for ▁his ▁prepar ation ▁of ▁medical ▁spec im ens — th ese ▁were ▁still ▁presented ▁up ▁to ▁the ▁nin ete enth ▁century , ▁especially ▁in ▁Moscow , ▁as ▁master pie ces