The city of Troyes in Champagne has plenty to see and do set against a backdrop of interesting architecture and narrow streets in the old town.
This city has three cathedrals: the Cathédrale Saint-Pierre et Saint-Paul featuring notable doorways, stained-glass, and a treasury; the Saint-Urbain and the Sainte-Madeleine. If religious architecture isn't your thing then why not visit the Museum of Modern Art.
Reims holds a 13th-century Cathedral, which is a famous jewel of Gothic architecture. This cathedral was actually destroyed in WW1 but has since been restored to all its former glory including the stained glass windows, the stunning facade and the interior.
Other things to do in Reims include: Palais de Tau, 11th-century Saint-Rémi Basilica (part of a former abbey), museums of archeology, art and several champagne cellars.