▁the ▁Royal ▁Engine ers . ▁Int ended ▁to ▁secure ▁Quebec ▁City ▁against ▁the ▁Americans ▁and ▁serve ▁as ▁a ▁refuge ▁for ▁the ▁British ▁g arrison ▁in ▁the ▁event ▁of ▁attack ▁or ▁re bell ion , ▁the ▁Cit ad elle ▁incorpor ated ▁a ▁section ▁of ▁the ▁French ▁en ce inte ▁of ▁ 1 7 4 5 ▁and ▁the ▁layout ▁was ▁based ▁on ▁S éb ast ien ▁Le ▁Pr estre ▁de ▁Va ub an ' s ▁design ▁for ▁an ▁arms , ▁m un itions , ▁and ▁supplies ▁dep ot , ▁as ▁well ▁as ▁a ▁bar ra cks . ▁That , ▁though , ▁was ▁somewhat ▁of ▁an ▁an ach ron ism ▁by ▁the ▁time ▁of ▁the ▁fort ' s ▁completion , ▁in ▁comparison ▁to ▁other ▁contemporary ▁European ▁military ▁architecture . ▁Add itional ▁buildings ▁were ▁completed ▁in ▁ 1 8 5 0 . ▁ ▁After ▁Canadian ▁Confeder ation ▁in ▁ 1 8 6 7 , ▁Canada ▁became ▁responsible ▁for ▁its ▁own ▁defence ; ▁the ▁British ▁depart ed ▁the ▁Cit ad elle ▁in ▁ 1 8 7 1 . ▁Two ▁batter ies ▁of ▁the ▁Royal ▁Canadian ▁Art illery ▁were ▁established ▁at ▁the ▁Cit ad elle ▁and ▁an ▁art illery ▁school ▁was ▁opened ▁in ▁ 1 8 7 1 , ▁followed ▁by ▁a ▁caval ry ▁school . ▁From ▁the ▁late ▁ 1 9 th ▁century , ▁living ▁conditions ▁for ▁soldiers ▁at ▁the ▁fort ▁gradually ▁improved ; ▁can te ens ▁were ▁opened ▁and ▁the ▁cas em ates ▁were ▁made ▁more ▁comfortable . ▁The ▁pres ervation ▁of ▁much ▁of ▁the ▁fort ifications