The commune of Guyancourt comprises several districts. The first of them, corresponding to the old village, is known as "le village", the others are named:
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.
Work to restore the churchSaint-Victor put the date of the sarcophages at the Merovingian era. 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 forms part of the "Grand Parc" of the sun king Soleil, 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, we know that Guyancourtois, who were mostly modest peasants, lived with difficulty under conditions of famine.
France is partly occupied by the Prussian armies. The enemy spreads terror, the houses are plundered, the inhabitants maltreated. Four hundred of them 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 1939–1945 also touched Guyancourt, which was liberated by August 25, 1944.
The end of the twentieth century
Starting from the beginning of the 1950s, the Paris area saw a considerable demographic growth. To structure the development of the suburbs, it was decided to create several new towns around Paris, one of which being Saint-Quentin-en-Yvelines. The new city of Saint-Quentin-en-Yvelines includes today seven communes, one of which is Guyancourt. In 1950 Guyancourt was only one small village. The commune grew since 1970 to reach the figure of 27,000 inhabitants in 2004.
: Poet, writer, lampoonist, storyteller, lyric writer, novelist, local councillor and départemental. The author of about thirty works, he also assumed several mandates of mayor, advising general, and President of the urban community.
Economy
Industrial fabric
Guyancourt accommodates not only many SME and trade, but also several large companies, such as:
Guyancourt is served by no station of the Paris Métro, RER, or suburban rail network. The closest station to Guyancourt is Saint-Quentin-en-Yvelines station on Paris RER line C, on the Transilien La Défense suburban rail line, and on the Transilien Paris – Montparnasse suburban rail line. This station is located in the neighboring commune of Montigny-le-Bretonneux, from the town center of Guyancourt.