Henry H. Cook Mansion, ca. 1900.

In 1883, Henry Cook, a railroad millionaire, purchased the entire block between Fifth and Madison Avenues and 78th to 79th Streets. His plan was to preserve a particular type of neighborhood (read: not stables, tenements or the wrong type of people). He divided the block into single-family lots and wrote in deed restrictions that were severely limiting. In the 1890s, slowly and with purpose–to create a block of homes occupied only by the types of families he would want to be surrounded by– he sold the lots.

Before selling the surrounding lots, he had built for himself a massive mansion on the corner of Fifth Avenue and 78th Street. The mansion was extravagant, with a $15,000 Italian fireplace and mantel and oak paneling that cost $55 a section. The exterior was a layered pile of white, blue and red granite.

Cook would die in 1905 and in 1909 his estate sold the building to James Duke. It was a wedding present to his new wife. Duke considered renovating the mansion, but ultimately decided to demolish it and built a new house. Supposedly the contractor hired for the demolition called the mansion “the best-built house ever torn down in New York City.” (Though it is unlikely the contractor survived to mid century to see the wave of grand homes razed prior to the Landmarks Law.)