Here is a guide to the Gilded Age mansions on 5th Avenue, both those still standing and those lost.
Fifth Avenue Millionaires' Row
NYC: Fifth Ave Gilded Age Mansions Guided Walking Tour in New York
Architectural artifacts from two demolished 1909 Upper East Side
A Guide to the Gilded Age Mansions of 5th Avenue's Millionaire Row
The Marble Twins, Plant Mansion (Houses at 647, 651-53 Fifth
Gilded Age Mansions
Then and Now: Millionaire's Row Mansions of Fifth Avenue
A guide to the Gilded Age mansions of 5th Avenue's millionaire row
Cleveland in the Gilded Age: A Stroll Down
Gilded Age Mansions in NYC - CitySignal
Joan Brothers on LinkedIn: #newyork #newyorkcity #manhattan #zoo
NYC: Fifth Ave Gilded Age Mansions Guided Walking Tour
The Marble Twins, Plant Mansion (Houses at 647, 651-53 Fifth
A Guide to the Gilded Age Mansions of 5th Avenue's Millionaire Row
Gilded Age Fifth Avenue Millionaire's Row