Prehistoric

The site of the city was already inhabited by Neolithic tribes who left hundreds of vestiges such as arrows, flint scrapers, polished axes... which have been recovered in the districts of Bouviers, Troux and Villaroy.

Antiquity

The civilization continued through Roman times, as Mr. Leclère, a farmer, demonstrated in a fortuitous way in 1892 by unearthing an antique ballot box in his field.

The religious life

Work to restore the church Saint-Victor put the date of the sarcophages at the Merovingian era (from the seventh century). It is believed that the construction of the first church dates from the fourteenth century. Several funerary vases and a tomb stone dating from the sixteenth century were updated. The church was renovated in the fifteenth century, then entirely rebuilt in the sixteenth century. The most recent restoration goes back to 1998.

Guyancourt and the Palace of Versailles

Guyancourt forms part of the "Grand Parc" of the sun king Soleil (Louis XIV), which extended around the castle of Versailles. The essential vocation of the populous communes neighbouring the castle is market-gardening, to provide for the important needs for the Court.

French revolution

Thanks to the register of grievances sent to the governmental authorities (1789), we know that Guyancourtois, who were mostly modest peasants, lived with difficulty under conditions of famine.

The Franco-Prussian War of 1870

France is partly occupied by the Prussian armies. The enemy spreads terror, the houses are plundered, the inhabitants maltreated. Four hundred of them (an enormous figure for the time) prefer to flee.

The 1900s

At the beginning of the twentieth century, Guyancourt was a large village where one cultivates corn, oats, beets, fodder and potatoes. The trades were numerous, with almost 16 wine merchants for 614 inhabitants.

The war of 1914–1918 cost the lives of thirty-six Guyancourtois. The war of 1939–1945 also touched Guyancourt, which was liberated by August 25, 1944.

Industrial fabric

Guyancourt accommodates not only many SME and trade, but also several large companies, such as:

• Le Technocentre Renault (automobile)
• The head office of Bouygues Construction
  • At one time parent company Bouygues had its head office in the Kevin Roche-designed Challenger complex.^[6]
• The national case of Crédit Agricole
• The registered office of McDonald's, France
• Prost Grand Prix (closed now).

Higher education and research

• Guyancourt is home to a campus of the University of Versailles-Saint-Quentin. The buildings located in the commune relate to the lessons on human rights and the social sciences.
• One also finds there research laboratories of the INRA (National Institute of Agronomic Research)

Primary and secondary schools

Junior high schools:

• Collège Ariane^[7]
• Collège Les Saules^[8]
• Collège Paul-Eluard^[9]

Senior high schools:

• Lycée Polyvalent Descartes^[10]
• Lycée de Villaroy^[11]
• Lycée Émilie-de Breteuil^[12]
• Lycée d'hôtellerie et de tourisme de Guyancourt^[13]