The Pombaline style was a Portuguese architectural style of the 18th century, named after Sebastião José de Carvalho e Melo, the first Marquês de Pombal, who was instrumental in reconstructing Lisbon after the earthquake of 1755. Pombal supervised the plans drawn up by the military engineers Manuel da Maia, Eugénio dos Santos and Elias Sebastian Pope (later succeeded by Carlos Mardel). The new city (mostly the Baixa area now called Baixa Pombalina) was laid out on a grid plan with roads and pavements fixed at . The previously standing Royal Palace was replaced with the Praça do Comércio which, along with square Rossio, defines the limits of the new city.