Rennes is a town in north-west France, capital of the Ille-et-Vilaine département and of the Brittany region. The city is located in Upper Brittany at the confluence of the Ille and Vilaine rivers.It is famous for its medieval half-timbered houses and its huge cathedral.Situated on Europe's Atlantic Arc, Rennes has a population of 225,081, making it the largest city in the Brittany region, the second largest in the Greater West and the eleventh most populous in France.