▁museum ▁places ▁of ▁worship ▁ ▁State ▁Museum ▁of ▁the ▁History ▁of ▁Religion ▁ ▁Christian ▁ ▁Russian ▁Orth odox ▁ ▁Kaz an ▁C athedral , ▁now ▁not ▁a ▁museum ▁as ▁such , ▁but ▁formerly ▁housing ▁Museum ▁of ▁Religion ▁and ▁A the ism ▁( present ly ▁occup ying ▁a ▁different ▁building , ▁the ▁State ▁Museum ▁of ▁the ▁History ▁of ▁Religion ▁); ▁designed ▁by ▁And rey ▁Vor on ik hin , ▁the ▁c athedral ▁res emb les ▁V at ican ' s ▁St . ▁Peter ' s ▁Bas il ica ▁and ▁is ▁a ▁monument ▁to ▁Russia ' s ▁victory ▁in ▁Napole onic ▁Wars ▁of ▁ 1 8 1 2 - 1 4 ▁▁▁ ▁Saint ▁Isaac ' s ▁C athedral ▁- ▁designed ▁by ▁ ▁August e ▁de ▁Mont fer rand ; ▁museum ▁and ▁its ▁other ▁branches ▁(" The ▁Ring ▁of ▁C athed r als " ): ▁▁ ▁Church ▁of ▁the ▁Sav ior ▁on ▁Blood ▁- ▁built ▁to ▁mark ▁the ▁place ▁where ▁the ▁liber ally ▁reform ing ▁Ts ar ▁Alexander ▁II ▁of ▁Russia ▁was ▁assass in ated ▁on ▁March ▁ 1 , ▁ 1 8 8 1 ▁by ▁People ' s ▁Will ▁terror ists ▁▁▁ ▁Saint ▁Sam pson ▁the ▁H osp itable ' s ▁C athedral ▁- ▁a ▁ 1 7 3 0 s ▁monument ▁to ▁Russia ' s ▁victory ▁in ▁the ▁decis ive ▁Battle ▁of ▁Pol t ava ▁in ▁the ▁Great ▁Northern ▁War ▁over ▁the ▁Swedish ▁Empire ; the ▁church ▁grounds ▁became ▁the ▁city ' s ▁first ▁inter den omin ational ▁c emetery ▁where ▁many ▁of ▁St