▁def ences ▁and ▁kill ▁Marie ▁Anto in ette ' s ▁body gu ards , ▁Marie ▁Anto in ette ▁escaped ▁from ▁the ▁palace ▁through ▁a ▁secret ▁passage way . ▁ ▁The ▁Mik h ail ov sky ▁Castle ▁is ▁a ▁castle ▁that ▁was ▁built ▁to ▁protect ▁the ▁Russian ▁Ts ar ▁Paul ▁I ▁from ▁assass ins . ▁Comple ted ▁in ▁ 1 8 0 0 , ▁the ▁castle ' s ▁protect ive ▁features ▁included ▁massive ▁walls ▁and ▁water ▁on ▁all ▁four ▁sides ▁( ri vers ▁and ▁can als ), ▁with ▁draw brid ges ▁that ▁were ▁raised ▁at ▁night ▁and ▁gun ▁emp lac ements ▁over looking ▁the ▁draw brid ges . ▁The ▁Ts ar ▁also ▁had ▁a ▁secret ▁passage way ▁built ▁into ▁the ▁hall way ▁outside ▁his ▁bed room ▁to ▁enable ▁him ▁to ▁escape ▁if ▁ass ail ants ▁managed ▁to ▁get ▁past ▁the ▁castle ' s ▁def ences . ▁However , ▁he ▁was ▁never ▁able ▁to ▁use ▁the ▁secret ▁passage way . ▁Fort y ▁days ▁after ▁he ▁took ▁up ▁residence ▁in ▁the ▁castle , ▁a ▁group ▁of ▁co - con sp ir ators ▁killed ▁him ▁in ▁his ▁bed room . ▁ ▁During ▁Japan ' s ▁Bos hin ▁War ▁( 1 8 6 8 – 1 8 6 9 ), ▁the ▁Emperor ' s ▁Imperial ▁forces ▁attacked ▁the ▁loyal ▁retain ers ▁of ▁the ▁sh ō gun ▁at ▁A iz u ▁Bas in . ▁A ▁band ▁of ▁ 1 5 - ▁and ▁ 1 6 - year - olds ▁loyal ▁to ▁the ▁Sh og un , ▁who ▁called ▁themselves