Mariastella lives in Rome and holds an Art History degree with a specialisation in modern and contemporary art from La Sapienza University of Rome.
From 1988 to 2016, she was an executive officer at the National Gallery of Modern Art in Rome and director of the Boncompagni Ludovisi Museum of Decorative Arts (Italian Ministry of Culture). From November 2017 to September 2023, she was the manager of the Italian Ministry of Culture. During this time, she not only directed many important museums in Italy, such as Castel Sant’Angelo and the Pantheon in Rome, Castel del Monte and Castello Svevo di Bari, but also organised and curated national and international exhibitions, notably: 100 Works of Italian Art, 100 Masterpieces for Japan (Tokyo, 2001), Notes at the stadium: 90 Works on the Theme of Football in Twentieth-century Italian Art (South Korea, Turkey, South America, 2002) and Klee e l’Italia (Roma, 2012), Il Mondo Di Giorgio De Chirico. Sogno o Realtà (Barcellona, Madrid 2017), La Bilancia E La Spada. Storie di Giustizia a Castel Sant’Angelo (Roma, 2023).
Mariastella is a widely recognised expert in 19th– and 20th-century art. Over the years, she published numerous works on artists and art-related topics, some of the most significant being on Mario Sironi, Giorgio de Chirico, Paul Klee, Amedeo Modigliani, Italian Art in the 30’s, Colonial Italian Art in Africa, and Futurism. Furthermore, she is a court-appointed technical consultant for numerous Italian courts (Rome, Milan, Florence, etc.), assessing the authenticity of artworks from various periods in which she is an expert.