9. The Bostwick Mansion, 800-802 Fifth Avenue: Demolished

As a founding partner and treasurer of Standard Oil, Jabez A. Bostwick was one of the many men who made it big in the oil business. Bostwick, like most wealthy men of his time, took his fortune and his family to Fifth Avenue where he built a 10-room French Second Empire mansion in 1876 on the corner of 61st Street. When his daughter Nellie married, he extended the mansion to 801 and 802 Fifth Avenue.

After Jabez’s death and other family tragedies befell the Bostwicks, his wife Helen remained in the home until she too passed away in 1920. Family friend Mrs. Marcellus Hartley Dodge, a daughter of William Rockefeller purchased the Helen Bostwick home in 1922 and left it seemingly abandoned until 1977. In 1979, the Gilded Age mansions were demolished to make way for a 33-story luxury apartment building.