São Paulo is the largest city in Brazil, the largest city in the Southern hemisphere, and the world’s 7th largest metropolitan area in the world. The name of the city honors Saint Paul. More than 19 million people live in th Sao Paulo metropolitan area. São Paulo was founded in 1554. São Paulo officially became a city in 1711. This photo of the São Paulo skyline has been selected as the Daily Cool Photo on Running Wolf’s Rant for the 20th of September 2010.