▁of ▁S . ▁Pietro ▁in ▁V ira , ▁until ▁it ▁became ▁an ▁independent ▁parish ▁in ▁ 1 8 4 6 . ▁ ▁The ▁church ▁of ▁San ▁Carlo ▁was ▁built ▁in ▁ 1 8 4 4 - 4 6 . ▁ ▁The ▁C od ice ▁delle ▁stra de ▁di ▁Como ▁( 1 3 3 5 ) ▁mentions ▁a ▁tower ▁in ▁Mag ad ino , ▁though ▁no ▁trace ▁of ▁the ▁tower ▁has ▁been ▁found . ▁ ▁A ▁castle ▁is ▁also ▁mentioned ▁in ▁a ▁chron icle ▁from ▁the ▁ 1 7 th ▁century , ▁but ▁it ▁is ▁also ▁lost . ▁ ▁The ▁chron icle ▁says ▁it ▁was ▁built ▁in ▁ 1 3 6 5 ▁on ▁the ▁orders ▁of ▁G ale azzo ▁Vis cont i ▁for ▁the ▁inhabitants ▁of ▁Loc ar no ▁and ▁destroyed ▁in ▁ 1 5 1 8 ▁by ▁the ▁Swiss . ▁ ▁Mag ad ino ▁was ▁a ▁major ▁port ▁and ▁an ▁important ▁custom s ▁station ▁at ▁the ▁trans it ▁route ▁north ▁from ▁Lomb ard y ▁to ▁the ▁cities ▁of ▁the ▁Al ps , ▁and ▁its ▁importance ▁grew ▁in ▁ 1 5 1 5 ▁after ▁the ▁collapse ▁of ▁the ▁bridge ▁over ▁the ▁T ic ino ▁river ▁at ▁Bell in z ona . ▁ ▁With ▁the ▁introduction ▁of ▁regular ▁steam ship ▁traffic ▁( 1 8 2 6 ) ▁and ▁the ▁opening ▁of ▁the ▁road ▁over ▁the ▁Got th ard ▁Pass ▁( 1 8 3 0 ) ▁Mag ad ino ▁became ▁a ▁stop ▁on ▁the ▁coach ▁routes . ▁ ▁Many ▁new ▁w are h ouses , ▁hot