Before the Revolution the navigation on the Lower Seine, between Rouen and Paris, was managed by the provost of the merchants of Paris. This prestigious administration, playing the role of a municipality, had established masters of deck and masters of pertuis, royal officers responsible for ensuring the passage of the many boats going up the river to supply the capital. Jean Baboux, a historian living in Vernon, Normandy, a town on the banks of the river, will give a lecture on the institution created during the Hundred Years War.
The town halls of La Roche-Guyon, Moisson, Bonnières-sur-Seine and Bennecourt joined forces in 2022 to celebrate the Seine, their common living heritage: they offer meetings, animations, conferences on the 4 sites to promote access to biodiversity for all, history, culture, art and literature specific to this territory and create a link in the valley.