The Brokaw Mansion, ca. 1900.

Constructed between 1887 and 1890 for the millionaire clothing manufacturer Issac Vail Brokaw, the opulent mansion was modeled on the 16th century Chateau Chenonceaux in France’s Loire Valley. Built along "Millionaire's Row" on the east side of Fifth Avenue, the mansion lavishly designed inside and out, with a marble entrance, stained glass, carved wood decoration, mosaics, murals, and even a moat! Brokaw also had constructed on the property a number of homes for his children, including 7 East 79th Street and the 1905-built Gothic twin buildings at 984 and 985 Fifth Avenue.

The main house remained in the family until Brokaw's son George sold it in 1946 to the Institute of Radio Engineers (they would later also purchase two of the other Brokaw residences). In 1963 the organization, now called the Institute of Electrical and Electronics Engineers, sold the buildings to Campagna Construction Corporation, who announced in the fall of 1964 that they planned to demolish the buildings.

This announcement, paired with interest from the press public, and citywide organization, caught the city's attention and resulted in ardent calls for landmarks legislation. Nonetheless, despite the articles and rallies, the buildings were quickly and somewhat stealthily demolished in February in 1965. A year later, a 26-story cooperative apartment building was erected on the site.

The events surrounding the end of the Brokaw Mansion were a warning shot. The threat to the mansions moved the landmarks legislation off the Mayor's desk and into the City Council committee. It was the loss of the buildings that then pushed the legislation to a vote and the eventual signing into law on April 19, 1965.