hi ardecila
Here is a pic of the lamented concourse (destroyed 1969) with the
Great Hall of Union Station directly behind.
I didn't realize cars could park along that north/south driveway on the west side of the Chicago River (directly in front of the concourse ).
I can vaguely pick out the classical lighting fixture(s) that appear in the slide....AND in the concourse photograph.
You're really good at this. I'm impressed.