31 When the recent war was raging and spread in a lamentable way to the shores of Campania and Latium, it reached, as you know, Venerable Brethren, the holy summit of Monte Cassino and although We left nothing undone in persuading, exhorting, protesting lest an immense loss be inflicted on religion, on culture and civilization, nevertheless ruin and destruction came to that illustrious home of learning and piety which had survived the turmoil of centuries like a torch conquering darkness. Then when cities, towns, villages and hamlets around were overwhelmed in ruin, it seemed that even the Arch-Abbey of Cassino, the head house of the Benedictine Order, was sharing the grief and partaking the sufferings of its sons. Practically nothing else survived from the destruction except the sacred crypt in which the relics of the holy Patriarch are preciously kept.
Source: Fulgens Radiatur (Vatican.va)