Interior of what was then the world headquarters of General Motors

Photo from unknown source

The General Motors Building was the second largest office building in the world when it opened in 1920.

Photo from unknown source

The Grand Boulevard entrance of what was then the General Motors Building

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Cadillac Place shortly after opening as General Motors' world headquarters

Photo from the Indiana Limestone Company. Courtesy, Indiana Geological and Water Survey, Indiana University, Bloomington, Indiana

What was then the world headquarters of General Motors towers over the then-largely residential New Center neighborhood.

Photo from the Walter P. Reuther Library, Wayne State University