have been subject. The top and bottom of the window openings meet in a stylized arch, resulting in a delicate lattice appearance that Yamasaki re-used in his designs for the IBM Building in Seattle, the Oberlin Conservatory of Music, and the World Trade Center towers. The lattice is uninterrupted from the second through 28th floors, although on the mechanical floors above 26, the spaces in the lattice remain open instead of being glazed. These floors are enclosed by a recessed wall and the space between the outer and inner walls is illuminated after dark. From the building's opening through the early 1980s, the 26th floor was occupied by an upscale restaurant known as The Top of the Flame. Air-conditioning and mechanical equipment on the roof are concealed by a similar lattice work and also illuminated after nightfall. During much of the year, the lighting is white; however, the color is changed for special events, being red and green during December and red, white, and blue prior to the U.S. Independence Day and Canada Day holidays. Gallery See also List of tallest buildings in Detroit References Further reading Kvaran, Einar Einarsson, Architectural Sculpture of America, unpublished manuscript. External links Skyscraper office buildings in Detroit Downtown Detroit Woodward Avenue Office buildings completed in 1962 Commercial buildings on the National Register of Historic Places in Michigan Historic district contributing properties in Michigan National Register of Historic Places in Detroit Rock Ventures 1962 establishments in Michigan 1960s architecture in the United States Minoru Yamasaki buildings Modernist architecture in Michigan