The artistic development of the Italian art collector and artist Guglielmo Achille Cavellini / GAC (1914−1990) dates to the first half of the 1970s, when he came up with the 'movement' and 'self-historicization'. Self-historicization is actions born of egoism, self-glorification, rewriting art and history a la Cavellini, works of art and publications. With their unabashed honesty - they proved so successful that Cavellini became central figure in international relations and mail art in the end of the 1970s.

He made Artpoolt known all over the world of networkers the Hungarian, Central European cultural panorama he represented.