as of the 1950's, the word 'favela' became an official term extended to the use by the brazilian census.

In the second half of the 20th Century, between 1950 and 1960, populations living in the central zone of the city continued to reduce as a result of increased commerce and housing regulations.

The suburbs and peripheries were consecrated as the less expensive part of town to live while the South Zone enshrined itself as the domain of the affluent.