The town participates in a
Concours des villes et villages fleuris ("Towns and Villages in Bloom" competition) and in 2007 won two flowers.
Monuments • Church of St Vincent:
Church in the
Flamboyant Gothic style, consecrated on 2 August 1587 • Château du Val, 17th Century, situated on the edge of the
Forest of Saint-Germain-en-Laye, built by the architect
Jules Hardouin-Mansart. • The Orangery of the Château du Mesnil, situated in a protected zone of POS ND-EBC (Non-cultivable woodland)) which has been converted to 43 private houses • Old abandoned mineshafts (Château du Mesnil, now demolished), situated on the edge of the Orangery on the Rue de Général Leclerc • Artificial caves (abandoned), ancient glaciers (abandoned) and ruins of canals (now abandoned) in the communal woodlands (Château du Mesnil, now demolished).
Twin towns England:
Newmarket, Suffolk Famous people •
Émile Littré, bought a house in Mesnil-le-Roi, which he styled "Ménil-le-Roi," in 1847, and stayed there until his death in 1881; it was here that he did the bulk of his work on his great
Dictionnaire de la langue française (1872; supplement 1877) •
Augustin Henry-Lepaute, watchmaker •
Jacques Fath, tailor, born in Mesnil-le-Roi in 1912 •
Serge Gainsbourg, until then Lucien Ginsburg, married Élisabeth Levitsky at Mesnil-le-Roi Town Hall on 3 November 1951. He worked at this time at the Maison Champsfleur (actually an old people's home) as an assistant to young Israeli children whose parents were victims of the Holocaust. •
Jeanne Bourin, novelist and media personality •
Louis Pauwels, journalist •
Jules Rein, Politician, mayor of Mesnil-le-Roi, originator of the canton of Maisons-Laffitte – Le Mesnil-le-Roi – Houilles. ==Economy==