The Old Town of Stockholm has been threatened many times. The worst was when, in 1959, a large motorway was pulled through the heart of the city, a sword cut that split the Old Town in two. The Riddarholm church, where the Swedish regents are buried, is trapped by the traffic that roars forward a few meters away. Who in France would come up with the idea of building a motorway next to Nôtre Dame?

• Documentary