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
Meet the Locals and Hear Their Stories in the Loire Valley - Because we know the area intimately we can take you to all sorts of places that you might not otherwise see. Along the way we will often talk to locals who...