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The U.S. Post Office at 5 S. Washington St. in downtown Naperville was under construction when this photo was taken on June 1, 1940. Eighty-five years later, it still stands.

The U.S. Post Office at 5 S. Washington St. in downtown Naperville was under construction when this photo was taken on June 1, 1940. Eighty-five years later, it still stands.