lections , ▁a ▁digital ▁repository ▁made ▁available ▁by ▁Chicago ▁Col lections ▁arch ives , ▁libraries ▁and ▁other ▁cultural ▁institutions ▁in ▁the ▁city . ▁ ▁Loop ▁Ret ail ▁Historic ▁District ▁The ▁Loop ▁Ret ail ▁Historic ▁District ▁is ▁a ▁sho pping ▁district ▁within ▁the ▁Chicago ▁Loop ▁community ▁area ▁in ▁Cook ▁County , ▁Illinois , ▁United ▁States . ▁It ▁is ▁bounded ▁by ▁Lake ▁Street ▁to ▁the ▁north , ▁I da ▁B . ▁Well s ▁Drive ▁to ▁the ▁south , ▁State ▁Street ▁to ▁the ▁west ▁and ▁W ab ash ▁Avenue ▁to ▁the ▁east . ▁The ▁district ▁has ▁the ▁highest ▁density ▁of ▁National ▁Historic ▁Land mark , ▁National ▁Register ▁of ▁Historic ▁Places ▁and ▁Chicago ▁Land mark ▁designated ▁buildings ▁in ▁Chicago . ▁It ▁hosts ▁several ▁historic ▁buildings ▁including ▁former ▁department ▁store ▁flags hip ▁locations ▁Marshall ▁Field ▁and ▁Company ▁Building ▁( now ▁M acy ' s ▁at ▁State ▁Street ), ▁and ▁the ▁S ull ivan ▁Center ▁( former ly ▁Car son , ▁Pir ie , ▁Scott ▁and ▁Company ▁Building ). ▁ ▁Education ▁ ▁Colleg es ▁and ▁univers ities ▁Columbia ▁College ▁Chicago ▁and ▁Ro ose vel t ▁University ▁are ▁all ▁located ▁in ▁the ▁Loop . ▁De Paul ▁University ▁also ▁has ▁a ▁campus ▁in ▁the ▁Loop . ▁The ▁ ▁University ▁of ▁Illinois ▁at ▁U rb ana – Ch amp aign ▁and ▁University ▁of ▁Notre ▁D ame ▁run ▁their ▁EM BA ▁programs ▁in ▁their ▁Chicago ▁Camp uses ▁in ▁the ▁Loop . ▁ ▁National - Louis ▁University ▁is ▁located ▁in ▁the ▁historic ▁Pe op les ▁Gas ▁Building ▁on ▁Michigan ▁Avenue ▁across ▁the ▁street ▁from