
The brass letterbox in the lobby of the Koppers Building (now called Koppers Tower, because every Building became a Tower while you weren’t looking) is a stylized model of the Koppers Building itself.

This 1890 building was designed by Frederick Osterling, who also gave us the Arrott Building and the Union Trust Building. It now functions as a kind of parasite on the skyscraper Bell Telephone Building next door, but it is still an impressive work of architecture.
The Gulf Building, an Art Deco tower with a top modeled after the Mausoleum at Halicarnassus, is rendered here in old-postcard colors through the marvel of modern digital technology.
