

Estádio 1.º de Maio is a football stadium in the centre of São Bernardo do Campo, Brazil, which is the home of São Bernardo. With a capacity of 15,159 it is the second-largest football stadium in the ABC region, behind Estádio Anacleto Campanella. Currently the capacity is limited to 12,578 since part of the South Stand is closed for renovation.
The stadium is perhaps best known as the site of multiple massive trade union rallies between 1979 and 1980, led by Luiz Inácio Lula da Silva. It is named after the International Workers' Day and the date of a significant rally held at the stadium in 1980, which involved over 150,000 workers on strike. 1º de Maio's record attendance was recorded in 2011, when 15,159 spectators watched a Campeonato Paulista fixture between São Bernardo and Corinthians, which ended in a 2–2 tie.
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