1 As I do not wish anything which takes place here in your absence to escape the knowledge of your holiness, you must know that we have found some bodies of holy martyrs. For after I had dedicated the basilica, many, as it were, with one mouth began to address me, and said: Consecrate this as you did the Roman basilica. And I answered: “Certainly I will if I find any relics of martyrs.” And at once a kind of prophetic ardour seemed to enter my heart.
Source: Letters (New Advent)