The Château de Saint-Germain-en-Laye () is a former royal palace in the commune of Saint-Germain-en-Laye, in the département of Yvelines, about 19 km west of Paris, France. Today, it houses the musée d'Archéologie nationale (National Museum of Archaeology).
History
12th–13th centuries
The first castle, named the Grand Châtelet, was built on the site by Louis VI in 1124. The castle was expanded by Louis IX in the 1230s.
Louis IX's chapelle Saint Louis at the castle belongs to the Rayonnant phase of French Gothic architecture. A 1238 charter of Louis IX instituting a regular religious service at the chapel is the first mention of a chapel having been built at the royal castle. This was a Sainte Chapelle, to house a relic of the Crown of Thorns or the True Cross. Its plan and architecture prefigure the major Sainte-Chapelle which Saint Louis built within the Palais de la Cité at Paris between 1240 and 1248. Both buildings were built by Louis's favourite architect Pierre de Montreuil, who adapted the architectural formulae invented at Saint Germain for use in Paris. A single nave ends in a chevet, with almost all the wall areas filled by tall narrow glass windows, between which are large exterior buttresses. The ogives of the vault rest on columns between the bays and the column bases are placed behind a low isolated arcade. The building can thus be open and empty of all internal supports. This large number of windows is also enabled by the pierre armée technique, with metal elements built into the structure of the walls to ensure the stones' stability. The west wall is adorned by a large Gothic rose window in the Rayonnant Gothic style. It was in this chapel in 1238 that Baldwin II of Constantinople presented Louis with the relic of the crown of thorns and, though they were intended for the Sainte-Chapelle in Paris, they were housed here until the Paris chapel was consecrated in April 1248.
The castle was burned by the Black Prince in 1346; of it, only the Gothic chapel remains from the site's medieval phase. This Château Vieux was rebuilt by Charles V in the 1360s on the old foundations.
16th–18th centuries
The oldest parts of the current château were reconstructed by Francis I in 1539, and have subsequently been expanded several times. On 10 July 1547 a political rivalry came to a head in a bloody game here. Against the odds, Guy Chabot, 7th baron de Jarnac triumphed over François de Vivonne, seigneur de la Chasteigneraie, giving rise to the coup de Jarnac.
Henry II built a separate new château nearby, to designs by Philibert de l'Orme. It stood at the crest of a slope, which was shaped, under the direction of Étienne du Pérac into three massive descending terraces and narrower subsidiary mediating terraces, which were linked by divided symmetrical stairs and ramps and extended a single axis that finished at the edge of the Seine; the design took many cues from the Villa Lante at Bagnaia. "Étienne du Pérac had spent a long time in Italy, and one manifestation of his interest in gardens of this type is his well-known view of the Villa d'Este, engraved in 1573."
The gardens laid out at Saint-Germain-en-Laye were among a half-dozen gardens introducing the Italian garden style to France that laid the groundwork for the French formal garden. Unlike the parterres that were laid out in casual relation to existing châteaux, often on difficult sites originally selected for defensive reasons, these new gardens extended the central axis of a symmetrical building façade in rigorously symmetrical axial designs of patterned parterres, gravel walks, fountains and basins, and formally planted bosquets; they began the tradition that reached its apex after 1650 in the gardens of André Le Nôtre. According to Claude Mollet's Théâtre des plans et jardinage the parterres were laid out in 1595 for Henry IV by Mollet, trained at Anet and the progenitor of a dynasty of royal gardeners. One of the parterre designs by Mollet at Saint-Germain-en-Laye was illustrated in Olivier de Serres' (1600), but the Château Neuf and the whole of its spectacular series of terraces can be fully seen in an engraving after Alexandre Francini, 1614.