  Peter Damian, an eleventh-century monastic leader and Church reformer, has received a modest place in the historiography of early medieval philosophy because of his little tract De divina omnipotentia. In this work, Damian treats two questions related to the limits of divine power: can God restore virginity to a woman who has lost it, and, can God change the past? Damian has often been depicted as a thinker who, in his defense of divine omnipotence, went as far as denying the universal validity of the principle of non-contradiction. For the most part, this depiction of Damian is unfounded. Nevertheless, De divina omnipotentia is an interesting document related to the early developments of medieval discussion concerning modalities and divine omnipotence.