Rennes is the main city of the Île-et-Vilaine department and the capital of Brittany region, in the past several times the capital one of the historical duchy of Brittany.
It's called Resnn in dialect gallo-romano and Roazhon in Britain dialect , “Rennes” comes from “Redones”, name of the Gaulish tribe settled in Armorica to the IIth century aC.
Rennes is also one university city, the 7th in France after Paris, Toulouse, Lille, Lyon, Montpellier and Bordeaux.