The Praça do Comércio (Portuguese pronunciation: [ˈpɾasɐ du kuˈmɛɾsiu]; English: Commerce Square) is located in the city of Lisbon, Portugal. Situated near the Tagus river, the square is still commonly known as Terreiro do Paço ([tɨˈʁejɾu du ˈpasu]; English: Palace Square), because it was the location of the Paços da Ribeira (Royal Ribeira Palace) until it was destroyed by the great 1755 Lisbon Earthquake. After the earthquake, the square was completely remodelled as part of the rebuilding of the Pombaline Downtown, ordered by Sebastião José de Carvalho e Melo, 1st Marquess of Pombal, who was the Minister of the Kingdom of Portugal from 1750 to 1777, during the reign of Dom José I, King of Portugal.
The Pombaline Lower Town (Baixa Pombalina, Portuguese pronunciation: [ˈbajʃɐ põbɐˈlinɐ], or Baixa) area covers about 235,620 square metres of central Lisbon, Portugal. It comprises the grid of streets north of the Praça do Comércio, roughly between the Cais do Sodré and the Alfama district beneath the Lisbon Castle, and extends northwards towards the Rossio and Figueira squares and the Avenida da Liberdade, a tree-lined boulevard noted for its tailoring shops and cafes.
The Pombaline Baixa is an elegant district, primarily constructed after the 1755 Lisbon earthquake. It takes its name from Sebastião José de Carvalho e Melo, 1st Marquess of Pombal, the Prime Minister to Joseph I of Portugal from 1750 to 1777 and key figure of the Enlightenment in Portugal, who took the lead in ordering the rebuilding of Lisbon after the 1755 earthquake. The Marquis of Pombal imposed strict conditions on rebuilding the city, and the current grid pattern strongly differs from the organic streetplan that characterised the district before the Earthquake.