The building was originally a luxury hotel, though very little of the original structure remains. Between 1920 and 1937, four different architects took part in designing the new hotel. Sylvanus Marston, Garrett Van Pelt, Myron Hunt and George H. Wiemeyer all had a hand in creating the structure we see today. It was remodeled in the 1980s "under the design direction of" J. Rudy Freeman of Neptune & Thomas, and from what I hear it's magnificent inside. Since I've never been involved in a federal case, I haven't had the pleasure of finding out for myself.
Read the link. It sounds luscious. I need to see if I can get in there sometime. You know, just wander around a Federal Courts building and take pictures. Shouldn't be a problem.