It was one work that composed the exhibiton Gameleira Project 1971.It was about one of the biggest accidents in Brazilian civil engineering construction history, which took place in Belo Horizonte in 1971.With Oscar Niemeyer’s project, Minas Gerais Governor had plans to inaugurate Palace of Industry, when it would be celebrated the 7th anniversary of the Military “Revolution” in Brazil. However before, part of the construction slab collapsed, resulting in 117 deaths and missing workers.