Louis XVI style completed the new Château de Compiègne (1751–83), begun by Louis XV, and decorated it from 1782 to 1786. The King's principal architectural addition to Versailles was the new library on the first floor (begun 1774). He was much more generous to Queen Marie-Antoinette; she redecorated the Grand Apartments of the Queen at Versailles in 1785, and carried out important works on her apartments at the Palace of Fontainebleau and Compiegne, as well as new apartments in the Tuileries Palace. The King also gave the Queen the Petit Trianon at Versailles, and in 1785 bought a new chateau for her at
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