A milestone of modern art is the sculpture "Forme Uniche della Continuitae Nello Spazio" (Unique Forms of Continuity in Space), which is one of the key works in the collection of MoMA, New York. Boccioni's sculpture is also depicted on the current Italian 20-cent coin. This is a sculptor's model based on the 1913 original from the Museum of Modern Art, New York. It is cast in fine bronze using the lost-wax casting process. Finely patinated and polished. The overall height is 32 cm, mounted on a diabase base. The base measures 18.5 x 9 cm. Copyright: ars mundi / Umberto Boccioni