EntityQ3321303· pop 5· linked from 94 articlesMonroeSign in to savesubway station on the CTA Blue Line in Chicago, IllinoisConnectionsChicago "L"EntityChicagoEntitygeographic coordinate systemEntityrapid transitEntityWillis TowerEntityO'Hare International AirportEntityAon CenterEntitymetro stationEntityTwo Prudential PlazaEntityMillennium ParkEntityChicago LoopEntityisland platformEntityChase TowerEntityGrant ParkEntityMetraEntityChicago Board of Trade BuildingEntityMonadnock BuildingEntityFederal Reserve Bank of ChicagoEntityBlue LineEntityChicago Transit AuthorityEntityCategoriesCTA Blue Line stationsRailway stations in the United States opened in 1951