He was born Alfredo Gregori in Poggio Cinolfo, part of the town of Carsoli in the Province of L'Aquila. At age twelve, Gregori joined the Sylvestrines, a branch of the Benedictines. He began his novitiate in 1909 taking the name of Ildebrando (Hildebrand). He was ordained a priest in 1922.[1]
The abbot was moved at the plight of the many orphans and street children he saw in Rome during World War II. He began to provide shelter for young boys in the monastery, and in 1942 he founded the Monastero San Vincenzo at Bassano Romano where a small community of monks cared for the boys. He envisioned, though, a community of Religious Sisters who would undertake this task.
In 1950, Gregori formed the Prayerful Sodality, which in 1977 became the Benedictine Sisters of the Reparation of the Holy Face. He directed his spiritual daughters to the "charism of reparation," understood as an act of love against the "sin of social injustice". Currently the Sisters have 14 communities in Italy, one in Poland, one in Romania, two in India, and one in the Democratic Republic of the Congo.[2]
On 27 September 2000, the 50th anniversary of the religious congregation he had founded, Gregori was honored by an official letter from Pope John Paul II to CardinalFiorenzo Angelini.[3]
Gregori died at his monastery in November 1985.[1]