Cathédrale Notre Dame Crypt Chartres

The 100m crypt of Cathédrale Notre Dame, a tombless Romanesque structure built in 1024 around a 9th-century predecessor, is the largest in France. Tours in French (with a written English translation) lasting 30 minutes start at La Crypte, the cathedral-run shop selling souvenirs, from April to October. At other times they begin at the shop below the Clocher Neuf in the cathedral.