In 2001, it was the steelworks of Terni which donated the work of Umberto Mastroianni positioned at the junction between corso Tacito and via Angeloni, a widening that opens along the main road. It refers to an artwork that Mastroianni (deceased in 1998) had realized in 1980. "Opera" is the exact name given to the large sculpture by some renamed "Composizione di forme" (Compostion of shapes)
Either one of the names, however, leaves the observer to a free interpretation and the opportunity to live the sensation perceived when standing before Mastroianni's artwork.
The sculpture is a six-metre high monolith created in Cast Carbon steel( a process which enables the production of highly homogeneous steel) associated with nickel, chromium and copper.
On the other hand, Mastroianni distinguishes himself exactly because he was one of the few Italian sculptors, if not the only one, to use all the materials possible for his works, from the "classical" like bronze, marble, stone, iron, wood, but also more precious metals such as gold, silver, steel, but also brass, zinc, lead as well as less "classical" such as cardboard, fabric, and plastic. Not to mention wax and terracotta. His monumental works, often bronze composite structures, are born from a challenge of relationships between volumes, spaces, light, and shadows. Like the thirteen sculptures and polychrome bas-reliefs that Mastroianni donated to the State at the end of the 1980s and which are on show, in a hall dedicated to the sculptor in the Gallery of Modern Art. Therefore the Terni monolith is the product of his original art.
It has been positioned at the widening between Corso Tacito and via Angeloni, which is considered an intersection for the city street network of Corso Tacito, and therefore at the end of the 19th century, with that much older one which, coming from the cathedral, went towards Porta Spoletina. Precisely this more ancient street network, close to Mastroianni's sculpture, is called to mind by a double travertine curb inserted into the paving of Corso Tacito which it crosses.