Avenida da Liberdade is eleven hundred metres of boulevard, ninety metres wide, and it was built on top of a garden that most of Lisbon was not allowed to enter. The Passeio Público was laid out in 1764 behind a wall and remade as a public garden in 1838. Its rules barred the drunk, the sick, children on their own, men carrying loads on their backs and, in those exact words, men in a workman's jacket. Anyone not decently dressed was turned away.
Eight hundred and twenty-two trees were lifted out of the ground when the garden went, and the planes that shade the avenue now went in with the boulevard. Ten lanes of traffic run down the middle, but the two outer strips are paved in black and white limestone and carry most of the walking. The shops along them are the city's luxury addresses, and the theatres and hotels between them keep the avenue in use after the shops close. On the night of 12 June the traffic stops altogether and the whole length becomes a parade ground.