The 108 Chicago Landmarks, which are also Registered Historic Places, can be seen by inspection of List of Chicago Landmarks, which includes a column for date of NRHP listing. All 292 Chicago Landmarks are listed at: this Chicago Landmarks Commission list.
Searching for Chicago listings in the National Register database at [1] yields 367 listings because it includes boundary adjustments to existing historic districts and only includes Chicago listings through March 2010.
tps.cr.nps.gov
"U-505 (German Submarine)". National Historic Landmark summary listing. National Park Service. Archived from the original on 2012-02-12. Retrieved 2008-06-11.
uboat.net
"Uboat.net". The Boats – U-505. Retrieved 13 June 2008.
"U-505 (German Submarine)". National Historic Landmark summary listing. National Park Service. Archived from the original on 2012-02-12. Retrieved 2008-06-11.