Woolworth Building detail
Some of the terra cotta detail of the Woolworth Building, visible from one of the Control Group's conference rooms. Take a look at Cass Gilbert's use of yellow, blue, and violet -- colors invisible from the street but undoubtedly adding to the perception that the building's decoration has depth and detail.
I say a little more about the building on my New York City landmarks blog, The Masterpiece Next Door.
National Register Number
Woolworth Building: 66000554