The good critical reception and collecting of Leonardo Cremonini‟s artworks in US between 1952 and 1964 is constant and widespread, and it is an exemplary study case of understanding specific features of American interest in Italian art untill the early ‟60s and particular dynamics of US exhibit and art market system. Thanks to a series of unpublished archives records that fill gaps and correct mistakes in the artist‟s biography, the essay pieces together Cremonini‟s exhibit activities facilitated by the incisive and efficient dealer actions by Catherine Viviano, who opened a gallery dedicated to Italian art in New York since 1950. Moreover the text analizes the development of collecting by museums and private collecto rs as well as the increase of the market value of Cremonini‟s artworks. Finally it aims highlight the systemic reasons and these in detail connected with Cremonini‟s artistic story, which can explain the rapid rise of his success in American art market and its even faster decrease.