Echo Deco

Here’s a photo of Chicago’s NBC building taken at Worldcon a month or so ago.
With its vertical lines, symmetry, setbacks, towering mast, and flying buttresses (!!!), the building is a clear example of Art Deco.
Except that this building dates from the wrong era. Art Deco was created in the 1920s and died (as an architectural style) with the Great Depression, when no one could afford to build skyscrapers any more. As an industrial design movement, Deco died with the end of World War II.
This bui...