Polish Consulate General (Joseph Raphael De Lamar House), ca. 1975.

At the turn of the 20th century, Murray Hill was a fashionable district for the city’s wealthiest residents, trailing only Fifth Avenue in terms of prestige. Across the neighborhood, the existing housing stock of mid-19th century brownstones were quickly being replaced by extravagant new mansions, including this Madison Avenue gem.

Joseph Raphael De Lamar was a Dutch-born merchant and entrepreneur, who became wealthy investing in mining operations in the American West — new money, by New York standards. To establish his place in city society, De Lamar commissioned famed architect C.P.H. Gilbert to design an opulent Beaux-Arts mansion, the largest in Murray Hill. De Lamar’s ostentatious residence took three years to build and ultimately rose to a height of six stories, surmounted by a massive mansard roof.

After De Lamar’s death in 1918, the mansion passed to the American Bible Society, and later, the National Democratic Club. Since 1973, it has housed the Polish Consulate General.