This volume accompanies the exhibition scheduled for the 2007 Edition of Castelbasso Progetto Cultura aiming to trace an exhaustive scenery of informal art through some hundred historical works made by some of the numerous protagonists (Italian, European and American) of this abstract artistical current, many of which have never been displayed before. The exhibition also aims to put in evidence and evaluate some remarcable personalities that have not been sufficiently well known and appreciated up to now (like Luigi Boille, Mario De Luigi, Sergio Romiti and Piero Ruggeri). The collaboration with the Museum of Contemporary Art of Lissone (Milan) has made it possibile for Castelbasso's exhibition organizers to obtain the loan of some important works of the crucial years of informal art and to present to the public great protagonists such as: Afro, Baj, Burri, Capogrossi, Crippa, De Luigi, Dova, Dubuffet, Fautrier, Fontana, Gallizio, Hartung, Kline, Manzoni, Marca-Relli, Pollock, Sanfilippo, Santomaso, Scanavino, Schneider, Scialoja, Tápies, Turcato, Twombly, Vedova, Wols, among the others.