The Grand Trianon is a French Baroque style château situated in the northwestern part of the Domain of Versailles in Versailles, France. It was built at the request of Louis XIV of France as a retreat for himself and his maîtresse-en-titre of the time, the Marquise de Montespan, and as a place where he and invited guests could take light meals (collations) away from the strict etiquette of the royal court. The Grand Trianon is set within its own park, which includes the Petit Trianon.

French Baroque architecture, usually called French classicism, was a style of architecture during the reigns of Louis XIII (1610–1643), Louis XIV (1643–1715) and Louis XV (1715–1774). It was preceded by French Renaissance architecture and Mannerism and was followed in the second half of the 18th century by French Neoclassical architecture. The style was originally inspired by the Italian Baroque architecture style, but, particularly under Louis XIV, it gave greater emphasis to regularity, the colossal order of façades, and the use of colonnades and cupolas, to symbolize the power and grandeur of the King. Notable examples of the style include the Grand Trianon of the Palace of Versailles, and the dome of Les Invalides in Paris. In the final years of Louis XIV and the reign of Louis XV, the colossal orders gradually disappeared, the style became lighter and saw the introduction of wrought iron decoration in rocaille designs. The period also saw the introduction of monumental urban squares in Paris and other cities, notably Place Vendôme and the Place de la Concorde. The style profoundly influenced 18th-century secular architecture throughout Europe; the Palace of Versailles and the French formal garden were copied by other courts all over Europe.