Paris

The capital on the Seine that grew from a Roman river town into one of Europe's great centers of learning and Enlightenment argument, a central stage of modern revolution, and a self-appointed capital of art and beauty — a splendor repeatedly written in blood, from the Terror's guillotine to Haussmann's displacements to the Nazi occupation and the 1942 roundup of its Jews.

Paris taught the world three things: to think, to revolt, and to look. The salons and cafés where the Enlightenment argued for reason and liberty sat a short walk from the squares where the Revolution's guillotine worked, and from the boulevards where the Impressionists later painted modern light. The same city crowned itself the City of Light and crushed the 1871 Commune in a week of street fighting and mass executions, then watched French police round up its own Jews in 1942. Its beauty and its bloodshed were never separate stories. They were the same city.