The Baptistery of St John in Poitiers is claimed to be the oldest existing Christian building in France. Built in about 360 but much altered, it is worth half an hour (at least) of anybody's time.
For a plan of the building, there is a good link here, and for more information check out Wikipedia
Market Shopping in the Touraine Loire Valley - One of the highlights of many people's visit to France is a visit with us to one of the best traditional produce markets in the Touraine Loire Valley. Frui...