Marble House includes Marble House and many other historic Newport mansions, was added to the Register on December 8, 1972 and subsequently designated as a National Historic Landmark District on May 11, 1976. Marble House is one of the earliest examples of Beaux-Arts architecture in the United States, with design inspiration from the Petit Trianon at the Palace of Versailles. Jules Allard and Sons of Paris, first hired by the Vanderbilts to design some of the interiors for their Petit Chateau on Fifth Avenue in Manhattan, designed the French-inspired interiors of Marble House. The grounds were designed by landscape architect Ernest W.
Petit Trianon his long-term mistress, Madame de Pompadour, and was constructed between 1762 and 1768. Madame de Pompadour died four years before its completion, and the Petit Trianon was subsequently occupied by her successor, Madame du Barry. Upon his accession to the throne in 1774, the 20-year-old Louis XVI gave the château and its surrounding park to his 19-year-old Queen Marie Antoinette for her exclusive use and enjoyment. The château of the Petit Trianon is a celebrated example of the transition from the Rococo style of the earlier part of the 18th century, to the more sober and refined, Neoclassical style of