About the county Council of Yvelines                    

The Yvelines department subsidizes Rambouillet territories the Yvelines department was created in 1964. It is the largest of the departments resulting from the dismemberment of the Paris region (disappearance of the "Seine" and the Seine-et-Oise and creation of seven new departments including the Yvelines). It is the poet Yvelinois Jehan Depert who is at the origin of the name of the department, inspired by the one, put in the plural, of the ancient Forest of Yveline. This name will be adopted in 1968 by the National Assembly. https://www.yvelines.fr