Map of the Metropolitan Region of São Paulo (Greater São Paulo) with the coat of arms/civic heraldry of each municipality ("city").
The background colours used in this map ARE NOT the legal official colours of each municipality, I used only the more eye-catching colours of each municipality flag.
Modified from File:Mapa-RMSP.svg, by Marcos Elias de Oliveira Júnior

Coat of Arms source: Government website of each municipality (Public Domain)
Daniel "FrangoBoy" Santos