, ▁in ▁summer , ▁a ▁medieval ▁festival ▁takes ▁place ▁in ▁Santa ▁Maria ▁da ▁Fe ira ▁- ▁the ▁Vi agem ▁Med ieval ▁- ▁during ▁which ▁the ▁city ▁goes ▁back ▁to ▁the ▁Middle ▁A ges . ▁ ▁Architecture ▁The ▁municipality ' s ▁s ights ▁include ▁the ▁Con vent o ▁do ▁Esp í rito ▁Santo ▁( con vent ), ▁the ▁I gre ja ▁da ▁M iser ic ór dia ▁( ch urch ; ▁ 1 8 th ▁century ), ▁and ▁the ▁R ua ▁Dire ita ▁( street ; ▁ 1 8 th ▁and ▁ 1 9 th ▁century ▁architecture ). ▁However , ▁its ▁greatest ▁land mark ▁is ▁the ▁cast elo ▁Santa ▁Maria ▁da ▁Fe ira ▁Castle , ▁from ▁the ▁ 1 1 th ▁century . ▁ ▁Culture ▁ ▁The ▁municipal ▁hol iday ▁is ▁January ▁ 2 0 . ▁It ' s ▁the ▁day ▁when ▁the ▁whole ▁municipality ▁celebr ates ▁the ▁F og ace iras . ▁The ▁F og ace iras ▁is ▁a ▁special ▁local ▁hol iday . ▁During ▁the ▁Middle ▁A ges , ▁the ▁lands ▁of ▁Santa ▁Maria ▁( as ▁it ▁was ▁known ▁back ▁then ) ▁were ▁inf ested ▁by ▁the ▁dark ▁pl ague . ▁To ▁get ▁rid ▁of ▁this ▁cal am ity , ▁the ▁loc als ▁offered ▁a ▁sweet ▁roll , ▁called ▁f oga ça , ▁to ▁the ▁patron ▁saint ▁Saint ▁Sebast ien . ▁The ▁F og ace iras ▁have ▁been ▁celebrated ▁for ▁five ▁hundred ▁years , ▁since ▁the ▁er adic ation ▁of ▁the ▁dark ▁pl ague . ▁ ▁The ▁municipality ▁has ▁a ▁science ▁museum