São Paulo, the dynamic financial center of Brazil, is among the most populated cities in the world, with several cultural institutions and a rich architectural tradition. Its iconic buildings range from its neo-Gothic cathedral and the 1929 Martinelli Building skyscraper to the curved Copan Building by modernist architect Oscar Niemeyer. The colonial-style Pátio do Colégio church marks the site where Jesuit priests founded the city in 1554. (by wikipedia)