Rio de Janeiro
Rio has more people living in slums than any other city in Brazil, according to the 2010 Census. More than 1,500,000 people live in its 763 favelas, 22% of Rio's total population. São Paulo, the largest city in Brazil, has more favelas (1,020) in sheer numbers, but proportionally has fewer people living in favelas than Rio.
Immigration to Brazil
While in São Paulo the Italians predominated, in the city of Rio de Janeiro the Portuguese remained as the main group. In 1929, as many as 272,338 Portuguese immigrants were recorded in the Federal District of Brazil (nowadays the city of Rio de Janeiro), more Portuguese born people than any other city in the world, except for Lisbon (which had 591,939 inhabitants in 1930).