  Peter Damian was a voluminous writer. The most important part of his production is his letters, which number 180. Damian’s treatises are also included in the collection of letters because they take the form of letters. The only one of Damian’s works which is considered to be of philosophical interest is Letter 119, which is better known as De divina omnipotentia (On Divine Omnipotence). This letter is addressed to Abbot Didier of Monte Cassino and his community, and it is dated at the beginning of 1065.