"Angel Cage" Exhibit at Cooper-Hewitt Museum, by Unknown, 1976, Smithsonian Archives - History Div, The "Angel Cage," designed by Japanese architect Arata Isozaki, was part of "Man transFORMS: Aspects of Design," the opening exhibition of the Cooper-Hewitt Museum of Decorative Arts and Design (Cooper-Hewitt, National Design Museum) at its new home in the renovated Carnegie Mansion..