In the last two decades several studies have been devoted to the figure of Giovanni Maria Sasso, the most prominent art dealer, painting restorer and antiquarian active in Venice at the end of the eighteenth century. Nevertheless, several aspects of his life, career and personality, still need to be examined. This paper focuses on the legacy and on the works of art recorded in the manuscript inventory compiled in 1803 by the academic painter Antonio Florian. The contents of this new documentary evidence are compared with the items listed in the auction sale catalogue which was printed in the same year in order to put on sale the major part of the paintings, drawings and prints owned by Sasso. The paper addresses specific topics, like the taste for ‘modelli’ and sketches, by making also new proposals in terms of identification of paintings attributed to Giambattista Pittoni and Giambattista Tiepolo.