Fodor's Expert Review Basilique St-Martin

Only two sturdy towers—the Tour Charlemagne and the Tour de l'Horloge (Clock Tower)—remain of the great medieval abbey built over the tomb of St-Martin, the city's 4th-century bishop and patron saint (and credited as the founder of "modern" wine making in France). Most of the abbey, which once dominated the heart of Tours, was razed during the French Revolution. Today the site is occupied by the bombastic neo-Byzantine Basilique St-Martin, which was completed in 1924. There's a shrine to St-Martin in the crypt.