WTTW's Chicago Tonight has a feature called Hidden Chicago.
On June 10, 2009 they broadcast a feature on architectural ornamentation Easily Overlooked Ornamentation. 5:10 into that broadcast is a segment on James Henry Breasted and the typmanum over the Oriental Institute doorway.
They also have a slideshow, and an extended "director's cut" of the show.
For more on the OI tympanum, see The Tympanum within the Arch on the Doorway to the Oriental Institute, and Some Decorative Motifs of the Oriental Institute Building.
See the chronicle of news about the Oriental Institute.