The Arc de Triomphe stands at the centre of a roundabout where twelve avenues meet, a single stone vault fifty metres high at the western end of the Champs-Élysées. Traffic circles it all day. Up close the piers carry huge carved panels of soldiers and winged figures, and the inner walls are dense with the names of victories, generals and campaigns. Beneath the vault lies the Tomb of the Unknown Soldier from the First World War, with a flame burning over it.
Climb the spiral stair to the roof and the twelve avenues run out below in every direction, the axis going straight to the Louvre one way and to the towers of La Défense the other. Napoleon ordered the arch after Austerlitz and never saw it finished; Jean Chalgrin drew it after Roman triumphal gates and built it far larger, and it opened in 1836. Four years later Napoleon's coffin passed beneath it, carried back to Paris nineteen years after his death.