25, January is the municipal holiday of SÃ£o Paulo City's Birthday, the biggest Brazilian and South American city. The city make 460 years old, since it was established in January, 25 of 1554. Some pics of the most famous points of the city. Paulista Avenue, our of '5th Avenue'. 'Paulista' is the gentilic of who born in SÃ£o Paulo State. Avenues in this area have the names of important SÃ£o Paulo State's cities. Who born in SÃ£o Paulo City is 'Paulistano'. India's Consulate, and that of some other countries, is in this avenue. Paulista Avenue has the most expensive square meter of the city.