▁Quebec ▁under ▁sie ge , ▁but ▁with d rew ▁after ▁the ▁arrival ▁of ▁British ▁rein for c ements ▁in ▁the ▁spring ▁of ▁ 1 7 7 6 . ▁ ▁Pres ent ▁fort ification ▁( 1 8 2 0 – present ) ▁▁ ▁As ▁t ensions ▁between ▁the ▁United ▁Kingdom ▁and ▁the ▁United ▁States , ▁as ▁well ▁as ▁fear s ▁of ▁further ▁re bell ion ▁in ▁British ▁North ▁America , ▁grew ▁in ▁the ▁late ▁ 1 8 th ▁century , ▁the ▁British ▁rein for ced ▁the ▁def ences ▁of ▁their ▁colon ies ▁according ▁to ▁a ▁plan ▁drawn ▁up ▁in ▁the ▁ 1 7 9 0 s ▁by ▁G other ▁Mann . ▁The ▁r amp arts ▁around ▁the ▁Upper ▁Town ▁cl iff ▁and ▁four ▁mart ello ▁to wers ▁( st ill ▁ext ant ) ▁on ▁the ▁Pla ins ▁of ▁Abraham ▁were ▁completed ▁before ▁ 1 8 1 2 . ▁A ▁cit adel ▁was ▁a ▁key ▁part ▁of ▁Mann ' s ▁design , ▁but ▁no ▁fort ▁was ▁built ▁because ▁the ▁cost ▁was ▁de emed ▁prohib itive . ▁▁ ▁That ▁opinion ▁finally ▁shift ed ▁following ▁the ▁War ▁of ▁ 1 8 1 2 ; ▁as ▁part ▁of ▁a ▁wider ▁improvement ▁of ▁Canada ' s ▁def ences ▁coordin ated ▁by ▁the ▁Duke ▁of ▁Richmond , ▁then ▁Governor - in - Ch ief ▁of ▁British ▁North ▁America , ▁the ▁existing ▁star ▁fort ▁was ▁built ▁between ▁ 1 8 2 0 ▁and ▁ 1 8 5 0 ▁under ▁the ▁direction ▁of ▁Lieutenant ▁Colonel ▁E lias ▁Walker ▁D urn ford ▁of