488 Madison Avenue, also known as the Look Building, is a 25-story office building in the Midtown Manhattan neighborhood of New York City. It is along Madison Avenue's western sidewalk between 51st and 52nd Streets, near St. Patrick's Cathedral. 488 Madison Avenue was designed by Emery Roth & Sons in the International Style, and it was constructed and developed by Uris Brothers. The building was originally named for its primary tenant, the American magazine Look.

647 Fifth Avenue, originally known as the George W. Vanderbilt Residence, is a commercial building in the Midtown Manhattan neighborhood of New York City. It is along the east side of Fifth Avenue between 51st Street and 52nd Street. The building was designed by Hunt & Hunt as one of the "Marble Twins", a pair of houses at 645 and 647 Fifth Avenue. The houses were constructed between 1902 and 1905 as Vanderbilt family residences. Number 645 was occupied by William B. Osgood Field, while number 647 was owned by George W. Vanderbilt and rented to Robert Wilson Goelet; both were part of the Vanderbilt family by marriage.