The Joseph Raphael De Lamar House is a mansion at 233 Madison Avenue at the corner of 37th Street in the Murray Hill neighborhood of Manhattan, New York City.

The De Lamar Mansion marked a stark departure from Gilbert's traditional style of French Gothic architecture and was instead robustly Beaux-Arts, heavy with rusticated stonework, balconies, and a colossal mansard roof.

The 1910 census taker found De Lamar in residence with his daughter Alice, by then 15, and nine servants, a typical ratio for the time.

He left an estate worth $29 million (equal to $590,000,000 in 2023) to his daughter, who continued living in the house for a short time before moving to an apartment at 740 Park Avenue.

Notes Further reading Media related to Joseph Raphael De Lamar House at Wikimedia Commons