You feel like you've been transported to 16th and 17th century France.
Auxerre has a huge and picturesque old town with winding streets and impressive half-timbered houses.
In Auxerre you can follow the Cadet Guillaume Joseph Roussel on foot. He leads you on a ~ 5 km long path through the heart of Auxerre to a total of 67 sights.
The Saint-Étienne Cathedral in Auxerre is a masterpiece of Burgundian Gothic architecture