Peter Damian (Latin: Petrus Damianus; Italian: Pietro or Pier Damiani; c. 1007 – 21 or 22 February 1072 or 1073) was a reforming Benedictine monk and cardinal in the circle of Pope Leo IX. Dante placed him in one of the highest circles of Paradiso as a great predecessor of Francis of Assisi and he was declared a Doctor of the Church on 27 September 1828. His feast day is 21 February.