 In 1907, long-distance trains ceased stopping there, leaving only suburban trains.In 1926, the original station at 22nd Street was closed and a new station was opened as its replacement at 23rd Street in conjunction with the Illinois Central Railroad's electrification program.When McCormick Place was expanded in 1996, the South Building was built over the existing 23rd Street Station, which was then reconfigured to serve the expanded convention center.