Biography
| 1910 |
Born September 21, Fontana Liri, Italy | |
| 1924 | Studies sculpture at Accademia de S Marcello, Rome and at the studio of Domenico Mastroianni | |
| 1926 | Moves to Turin. Attends the attelier of Guerrisi Michele | |
| 1930 | During the war member of the Resistance | |
| 1952 | Moved to Paris. First solo show at the Galerie de France, Paris | |
| 1961-69 | Headmastership of Accademia delle Belle Arti of Bologna | |
| 1989 | Awarded the Praemium Imperiale Prize for Sculpture, Japan Art Association, Tokyo | |
| 1990 | The Fondazione U. Mastroianni set up with 100 works from 1935-1990. Monument to Resistance unveiled in Poggibonsi, Siena. Solo show at The Hakone Open-Air Museum | |
| 1992 | Monumental steel work Belfagor installed in front of Palazzo Ducale, Genova | |
| 1992 | Profili exhibited at the XII Quadriennale, Rome | |
| 1993 | Monument to Erice unveiled by Pope John Paul II | |
| 1998 | Died February 23, Marino, Italy |


