Praça do Comércio

Landmark · BaixaLisbon, Portugal

This was the Terreiro do Paço, the palace yard, and the royal palace stood on it until the morning of 1 November 1755. That day an earthquake struck, a wave came up the Tagus, and fires burned for days; between them they destroyed the whole lower city. The Marquis of Pombal cleared the ruins and rebuilt the quarter to a single plan, and this square is its river frontage: a symmetrical U of yellow arcaded ministries opening directly onto the water, with a bronze José I on horseback in the middle and a triumphal arch on the north side leading into the grid behind. None of it was accidental. Pombal built it to show that a whole city could be planned on paper first. The square is meant to be entered from under the arcades, so that the open space and the river arrive together. The Tagus lies along the far edge, with the old quay steps running down into the water and ferries crossing beyond them. The space is wide enough that it feels like part of the estuary rather than a city plaza. The arch at the north end can be climbed, and from the top Rua Augusta runs straight away to the Rossio with the castle hill off to the right, which shows what Pombal did here better than any plaque.

Worth knowing

Good to know

Early or late — the square faces south onto the water, so it takes strong light most of the day and is at its best in the first and last hours.
Go down the quay steps — the stone stairs at the water's edge are the old landing place, worn round, and they put you at river level in the middle of the city.
The arch took a hundred and eighteen years — begun with Pombal's plan in 1755 and completed in 1873, and it changed from a bell tower into a triumphal arch somewhere along the way.
The ground you stand on was raised — the wave came up this square in 1755, and the rebuilding levelled and lifted the whole surface before the new blocks went up.

Things to do

1
Come in from under the arcades
Enter the square through the arcaded sides rather than from the river. You cross from shade and columns into an open rectangle with the water at the far edge, and the change of scale is the effect the whole design was built around.
2
Sit on the quay steps
The stone stairs at the southern edge run down into the Tagus and are worn smooth. Sit low on them with the ferries crossing and the arcades behind, and the square stops being architecture and becomes what it was — the place where the city met its river.
3
Take the lift up inside the arch
A lift climbs inside the pier to a small room where the clock mechanism sits, and a spiral stair does the last stretch onto the roof. You come out among the stone figures on the top, at the height of the ministry rooflines, with the yellow arcades running away on both sides beneath you and the ferries crossing below.