. ▁Because ▁of ▁the ▁presence ▁of ▁the ▁nearby ▁Italian ▁border ▁and ▁custom s ▁office , ▁and ▁later ▁as ▁part ▁of ▁an ▁access ▁route ▁to ▁the ▁St . ▁Got th ard ' s ▁T unnel , ▁the ▁two ▁villages ▁merged ▁and ▁grew . ▁ ▁Chi asso ' s ▁history ▁and ▁development ▁were ▁strongly ▁influenced ▁by ▁its ▁unique ▁location . ▁ ▁During ▁its ▁early ▁history , ▁a ▁castle ▁was ▁built ▁in ▁Chi asso ▁as ▁part ▁of ▁the ▁extended ▁fort ifications ▁of ▁the ▁city ▁of ▁Como . ▁ ▁It ▁was ▁a ▁sub urb ▁of ▁Como , ▁until ▁ 1 4 1 6 ▁when ▁it ▁was ▁incorpor ated ▁in ▁the ▁P ieve ▁of ▁Bal erna ▁and ▁given ▁to ▁the ▁Rus ca ▁family ▁to ▁manage . ▁ ▁The ▁houses ▁in ▁the ▁village ▁center ▁were ▁owned ▁by ▁the ▁Al br ici ▁family ▁and ▁were ▁granted ▁imperial ▁privileges . ▁ ▁Chi asso ▁had ▁become ▁an ▁independent ▁community ▁som etime ▁before ▁ 1 5 5 2 . ▁ ▁In ▁the ▁contemporary ▁documents , ▁it ▁is ▁mentioned ▁as ▁Cl as io ▁tab ern ar um ▁( Ch i asso ▁of ▁ta ver ns ) ▁referring ▁to ▁its ▁function ▁as ▁a ▁trans it ▁point . ▁ ▁Bo ff al ora ▁is ▁mentioned ▁in ▁ 1 5 3 6 ▁as ▁a ▁municipality ▁and ▁remained ▁its ▁independence ▁until ▁the ▁second ▁half ▁of ▁the ▁ 1 7 th ▁Century . ▁ ▁They ▁became ▁a ▁single ▁parish ▁either ▁in ▁ 1 6 5 7 ▁or ▁ 1 6 7 7 . ▁ ▁Chi asso ' s ▁church