One of the most beautiful cities in the world, Paris has spent centuries cultivating its good looks. Robust medieval buildings have stood the test of time, and even a little of Gallo-Roman Lutetia survives to tell a tale. Monarchs of the Ancien Régime came and went, leaving their elegant stamp on their city; Napoleon, in turn, realised some of his grand ambitions in stone here. From the medieval Tour Jean-Sans-Peur to the Tour Eiffel, this is a city with more than its share of heritage sights.