McCormick Apartments (National Trust for Historic - View this location on map Among the city's most elaborate luxury apartment houses; residence from 1922-37 of millionaire industrialist, Secretary of the Treasury (from 1921-32, the longest cabinet tenure since Albert Gallatin), and author of the 'Mellon Plan' which stimulated the economic boom of the 1920s; built 1915-16, J.H. de Sibour, architect 1785 Massachusetts Avenue, NW, Washington , DC Historical

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