Castelão, Football stadium in Fortaleza, Brazil

Castelão is a football stadium in Fortaleza with natural grass and ranks among the largest sports venues in the country. The structure features multiple tiers of seating arranged around the pitch, along with sections for press and guests.

The stadium was built between 1969 and 1973 on 25 hectares bought from the Santa Casa de Misericórdia de Fortaleza for Cr$ 400,000, after a site in the western Alagadiço neighbourhood proved too costly to expropriate. It opened on 11 November 1973 with a 0–0 draw between Ceará and Fortaleza before about 70,000 people. Héctor Vigliecca's reconstruction for the 2014 World Cup added a roof over all stands and a new lower tier.

The stadium's official name honours Plácido Aderaldo Castelo, Ceará governor from 1966 to 1971, who pushed for its construction; locals call it Castelão, "Big Castle", or Gigante da Boa Vista. It is the home ground of Ceará Sporting Club and Fortaleza Esporte Clube, whose Clássico-Rei opened the venue in 1973. Pope John Paul II drew 120,000 people here in 1980, and Paul McCartney played to about 50,000 in 2013.

Visitors reach the complex via Alberto Craveiro Avenue, where ample parking is available. For major matches, arriving early is advisable as the surrounding area becomes busy and entry points spread across several sections.

The structure became the first stadium in South America to receive international certification for environmentally friendly construction. The renovation integrated rainwater harvesting and solar panels that now supply part of the energy needs.