Chicago is a large city in Illinois.
Robert Bell's mother, Rebecca Bell, and his sisters, Charlotte and Emily Bell, live in Chicago. His widow, Lily, goes to visit them in Chicago after Robert's death. Illinois Senator Jordan Crane has an office in Chicago, which Thomas Durant visits while Lily visits her in-laws. ("Revelations") Durant later travels back to Chicago after he is shot and recuperates there. He is accompanied by Eva, who acts as his nurse. ("Purged Away with Blood")