The tradition of the monastery holds that it was founded by Ludolfi Pamfili, a former soldier, later hermit.
[4] He enlarged the library, constructed a nearby cloister, and established a monastic house near San Severino.
In the second half of the 19th century its ancient book collection was sold, following the requisition of all ecclesiastical properties by the Italian Government due to friction with the Church.
Yet after the upheavals of that period, the monastic community was again established and continues today as a major house of the congregation.
[6] Pope John Paul II celebrated a 1000-year anniversary mass at Fonte Avellana in 1985.