The Pombaline Baixa is an elegant district, primarily constructed after the 1755 Lisbon earthquake. It takes its name from Sebastião de Melo, Marquis of Pombal, the Prime Minister to Joseph I of Portugal from 1750 to 1777, 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.
The Pombaline Baixa is one of the first examples of earthquake-resistant construction. Architectural models were tested by having troops march around them to simulate an earthquake." - in: wikipedia.
"It was built in the early 16th century in the Portuguese late Gothic style, the Manueline, to commemorate Vasco da Gama's expedition. This defensive, yet elegant construction has become one of the symbols of the city, a memorial to the Portuguese power during the Age of the Great Discoveries. In 1983 it was classified, together with the nearby Mosteiro dos Jerónimos, as a UNESCO World Heritage Site." in: wikipedia.
"The Pena National Palace is the oldest palace of the European Romanticism. It is located in Sintra. The palace stands on the top of a hill above the town of Sintra, and on a clear day it can be easily seen from Lisbon and much of its metropolitan area. It is a national monument and constitutes one of the major expressions of 19th century Romanticism in the world. The palace is a UNESCO World Heritage Site and one of the Seven Wonders of Portugal. It is also used for state occasions by the President of the Portuguese Republic and other government officials." - in: wikipedia.