The writer Stendhal remarked of 19th-century Nantes, "I hadn't taken twenty steps before I recognized a great city." Since then, the river that flowed around the upper-crust Ile Feydeau neighborhood has been filled in and replaced with a rushing torrent of traffic, and now major highways cut through the heart of town. Still, Nantes is more than the sum of its traffic jams. The 15th-century château is still in relatively good shape, despite having lost an entire tower during a gunpowder explosion in 1800. The 15th-century cathedral floats heavenward as well. Its white stones, immense height, and airy interior make it one of France's best. Across the broad boulevard, Cours des 50-Otages, is the 19th-century city. The unlucky Ile Feydeau, surrounded and bisected by highways, still preserves the tottering 18th-century mansion built with wealth from Nantes's huge slave trade. The Loire River flows along the southern edge of the Vieille Ville, making Nantes officially part of the Loire region, although historically it belongs to Brittany. In town you can see many references to Anne de Bretagne, the last independent ruler of Brittany, who married the region away to King Charles VIII of France in 1491. Bretons have never quite recovered from the shock.