Louis XV did not bring any changes to the Grand Trianon.
In 1740 and 1743, his father-in-law, Stanislas Leszczynski, former king of Poland, stayed there during his visits to Versailles.
Later, it was during a stay at Trianon that Louis XV fell ill before being transported to the Palace of Versailles, where he died on 10 May 1774.

No more than his predecessor had, Louis XVI brought no structural modifications to the Grand Trianon.
His wife, Queen Marie Antoinette, who preferred the Petit Trianon, gave a few theatrical representations in the galerie des Cotelle, a gallery with paintings by Jean l'Aîné Cotelle representing the bosquets of Versailles and Trianon.
 
During the French Revolution of 1789, the Grand Trianon was left to neglect.
At the time of the First French Empire, Napoleon made it one of his residences, and he furnished it in the Empire Style.
Napoleon lived at Trianon with his second wife, Marie Louise of Austria.

The next royals to live at the Grand Trianon were the King and Queen of the French – Louis Philippe I and his Italian wife Maria Amalia of the Two Sicilies.
He was a descendant of the Regent Philippe d'Orléans, and she was a niece of Marie Antoinette.

In October 1837, Marie d'Orléans (daughter of Louis Philippe I) married Alexander of Württemberg at the Grand Trianon.

In 1920, the Grand Trianon hosted the negotiations and signing of the Treaty of Trianon, which left Hungary with less than one-third of its pre-World War I land size.
To Hungarians, the word "Trianon" remains to this day the symbol of one of their worst national disasters.

In 1963, Charles de Gaulle ordered a renovation of the building.
 
A popular site today for tourists visiting Versailles, it is also one of the French Republic's presidential residences used to host foreign officials.
Louis XV did not bring any changes to the Grand Trianon. In 1740 and 1743, his father-in-law, Stanislas Leszczynski, former king of Poland, stayed there during his visits to Versailles. Later, it was during a stay at Trianon that Louis XV fell ill before being transported to the Palace of Versailles, where he died on 10 May 1774.
No more than his predecessor had, Louis XVI brought no structural modifications to the Grand Trianon. His wife, Queen Marie Antoinette, who preferred the Petit Trianon, gave a few theatrical representations in the galerie des Cotelle, a gallery with paintings by Jean l'Aîné Cotelle representing the bosquets of Versailles and Trianon.  
During the French Revolution of 1789, the Grand Trianon was left to neglect. At the time of the First French Empire, Napoleon made it one of his residences, and he furnished it in the Empire Style. Napoleon lived at Trianon with his second wife, Marie Louise of Austria. 
The next royals to live at the Grand Trianon were the King and Queen of the French – Louis Philippe I and his Italian wife Maria Amalia of the Two Sicilies. He was a descendant of the Regent Philippe d'Orléans, and she was a niece of Marie Antoinette. 
In October 1837, Marie d'Orléans (daughter of Louis Philippe I) married Alexander of Württemberg at the Grand Trianon.
In 1920, the Grand Trianon hosted the negotiations and signing of the Treaty of Trianon, which left Hungary with less than one-third of its pre-World War I land size. To Hungarians, the word "Trianon" remains to this day the symbol of one of their worst national disasters.
In 1963, Charles de Gaulle ordered a renovation of the building.  
A popular site today for tourists visiting Versailles, it is also one of the French Republic's presidential residences used to host foreign officials.
Grand Trianon