Monsignor Giulio Barbetta, who recounts his experience of this bombing, says that, while almost all the windows of the Holy Office building were shattered, the glass covering an image of Our Lady between it and the entrance to the Oratory of Saint Peter remained intact and the oratory itself suffered no more than the effects of shrapnel against its wall. This led to the placing of sculptures of two shield-bearing angels to right and left of the image above an inscription that states: AB ANGELIS DEFENSA KAL. MART.