Sat, 07/13/2024 - 07:36 Tech Insider The Upper East Side mansion was built in 1901 at the height of New York's Gilded Age.Evan Joseph for Sotheby's International Realty Tags Real Estate, gilded-age, real-estate, nyc-real-estate, Mansion, mansions Source One of New York City's last surviving Gilded Age mansions is for sale for $65 m…