Detroit Just Had the Single Largest Tax Foreclosure in American History

04/22/2015 12:28 pm ET | Updated Apr 22, 2015
Spencer Platt via Getty Images

Unlike so many industrial innovations, the revolving door was not developed in Detroit. It took its first spin in Philadelphia in 1888, the brainchild of Theophilus Van Kannel, the soon-to-be founder of the Van Kannel Revolving Door Company. Its purpose was twofold: to better insulate buildings from the cold and to allow greater numbers of people easier entry at any given time.

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