The MacArthur Foundation has just announced a new website highlighting the architecture and history of the Marquette Building. It is a very good site. Very good. Link here. But when you're done, come back to take a look at a few of the Marquette's elegant details (below).
No hint of compromise. Holabird and Roche were masters of their Art. Even more remarkable, more than a hundred years later, the MacArthur Foundation understands that Art and has shown a long term commitment to preserve it. This is real Chicago School. Cornice included.