Cooperfiel was a project started in December, 2006 with the objective to build a stadium for the Brazilian soccer club Sport Club Corinthians Paulista. The stadium would be named "Fielzão" ("Big Faithful", an allusion to the name of the Corinthians crowd). A multi-use arena would be built with money donated by the Corinthians supporters, which in return have their names engraved on an "Honour Wall" located in the main entrance of the future stadium.
The project no longer exists and its website shut down without previous notice.
References
Cooperfiel Wikipedia(Text) CC BY-SA