Bois-Guillaume () is a commune in the Seine-Maritime department in the Normandy region in northern France. Geography The town is a wealthy, residential hilltop suburb of Rouen, semi-rural, semi-suburban with a little farming and some light industry. It is considered part of Greater Rouen, being just to the northeast, at the junction of the D43 and the D928 roads. History Bois-Guillaume was originally a Gallo-Roman settlement of which few traces remain. Local legend claims that in 1040 William the Conqueror's mother built a country house on the hill and the area thus came to be known variously as Boscum Guillelmi or Bosco Willelmi, later becoming Bois-Guillaume. There is, however, no serious evidence of any link to William the Conqueror; this derivation of the town's name is therefore in all likelihood a folk etymology. By the late 19th century, nearby Rouen had expanded to such an extent that parts of Bois-Guillaume had become urbanized. This led to tensions between the urban neighborhoods closest to Rouen (such as Bihorel) and the rest of the commune, which had remained more rural. The situation came to a head in 1892, when Bihorel split from Bois-Guillaume and became a commune in its own right. As a result of the split, the commune of Bois-Guillaume saw its territory reduced by 22% and its population reduced by 38%. In 2010, the municipal councils of Bois-Guillaume and Bihorel began to cooperate more closely, with a view to merging in order to become a single commune once again. In July 2011, despite opposition among residents of both communes, the merger was approved by the two municipal councils and ratified by prefectoral order on 29 August 2011. The new commune of Bois-Guillaume-Bihorel came into being on 1 January 2012. Following an appeal, however, the prefectoral order was repealed on 18 June 2013, and the new commune was disbanded on 31 December 2013; on 1 January 2014, the two former communes of Bois-Guillaume and Bihorel were reinstated. Activities Bois-Guillaume is well known for its tranquility. No bars are open at night-time; people tend to go out in Rouen (city center). Bois-Guillaume's leisure amenities include several parks (Parc Anderson, Parc des Cosmonautes, and a dedicated play area called La Plaine de Jeux des Portes de la Forêt), a forest area (La Forêt Verte), and two cycle routes that pass through the town (Cailly–Robec and Plaine de la Ronce). There are also a