[1] Italian names are given in italics in parentheses for abbots before the third destruction of the abbey.
Between c. 580 and c. 585, the abbey was pillaged and burned by the Lombards and abandoned by its monks.
In 883, the abbey was destroyed by the Aghlabids and the monks moved to Teano and later Capua.
From Zaccaria on, the abbots are heads of the Cassinese congregation.
In 1944, the abbey was destroyed a fourth time during the battle of Monte Cassino.