The volume is the catalogue of the Mario Merz. Opere storiche – installazioni exhibition presented at the Fundación Proa in Buenos Aires from 19 October 2002 to 10 January 2003. The exhibition, curated by Danilo Eccher, for the first time presented the work of Mario Merz in Latin America. The catalogue includes a conversation between the curator and the artist, texts by Giorgio Guglielmino, Lucas Fragass and Hugo Petruschansky and an extensive photographic documentation.