▁as ▁leader ▁of ▁the ▁group ▁in ▁the ▁year ▁ 1 9 0 0 ▁after ▁Rab bi ▁Sh l omo ▁Z al man ▁died . ▁He ▁was ▁rav ▁of ▁the ▁ch as id im ▁in ▁Bab ru y sk ▁from ▁ 1 8 7 2 , ▁and ▁founded ▁a ▁yes h iva ▁there ▁in ▁ 1 9 0 1 . ▁He ▁author ed ▁a ▁two ▁volume ▁work ▁on ▁Has id ism , ▁titled ▁" Sh emen ▁La Ma or " ▁(" Light ▁for ▁the ▁L um inary "). ▁ ▁Kop ust ▁today ▁ ▁It ▁is ▁thought ▁that ▁after ▁the ▁death ▁of ▁the ▁fourth ▁re bbe ▁of ▁Kop ust , ▁the ▁ad her ents ▁of ▁the ▁Kop uster ▁movement ▁rejo ined ▁the ▁Ch abad - L ub av itch ▁movement . ▁ ▁The ▁oldest ▁ext ant ▁Ch abad ▁syn agog ue ▁in ▁Israel , ▁the ▁O hel ▁Y itz ch ok ▁( א ה ל ▁ י צ ח ק ) ▁syn agog ue ▁in ▁the ▁Me a ▁She ar im ▁neighborhood ▁of ▁Jerusalem — also ▁called ▁the ▁Ba al ▁Ha T anya ▁Sh ul ▁(: ▁" B aal ▁Ha T anya ' s ▁syn agog ue ") — active ▁since ▁ 1 9 0 0 , ▁was ▁originally ▁affili ated ▁with ▁Kop ust . ▁When ▁the ▁Lub av itch er ▁Reb be , ▁Y ose f ▁Y iz h ak ▁Sh ne erson , ▁visited ▁Jerusalem ▁in ▁ 1 9 2 9 , ▁he ▁did ▁not ▁visit ▁this ▁syn agog ue . ▁ ▁Rel