Situated on the Esplanade des Marronniers, the Roman columns bear witness to the time when Nyon, called Noviodunum, belonged to the Colonia Iulia Equestris founded by Julius Caesar between 45 and 27 BC. From this square, visitors can admire the view on the Alps and Lake Geneva and to attend many free concerts during the summer period.
On the Esplanade des Marronniers (Chestnut Tree Square) there are three Roman columns, two of them fully erected. They belonged to the cryptoporticus of the holy area of the second Roman forum built around 50 AD. They initially measured 7m50 including the top sculptured element.
The Roman columns were found under the Rue Delafléchère and placed on this marvellous point of view in 1958 for 2000 years celebration of the city of Nyon.
By its founding through Julius Caesar, the Colonia Iulia Equestris with its urban center Noviodunum, nowadays Nyon, was the first Roman Colony in Switzerland.
The first music kiosk, which is also located on this square, was inaugurated on June 17th 1894.
During summertime its a tradition to assist and dance on the Esplanade des Marronniers" to free concerts every Sunday.