The 50-room, five-storey beaux-arts mansion was the winter home of Larz Anderson, an American diplomat, and his wife, Isabel Perkins Anderson, an author and philanthropist.
After the house was completed in 1905, it became one of Washington’s most fashionable houses, entertaining guests including Calvin Coolidge and Winston Churchill.
Today’s members include male descendants of Revolutionary War officers. Larz Anderson had become a member while he served as an Army officer in the Spanish-American War.