Born to the Italian nobility. Priest. Canon of the catehdral of Bologna, Italy. Augustinian canon c.1104. Chosen bishop of Pavia, Italy c.1139, but adamantly refused the appointment, citing his inadequacy to the task. Elevated to cardinal–bishop of Palestrina in 1144 by Pope Lucius II.
- 1159 of natural causes
- Book of Saints, by the Monks of Ramsgate
- Our Sunday Visitor’s Encyclopedia of Saints
- Santi e Beati
- “Saint Guarinus of Palestrina“. CatholicSaints.Info. 17 June 2013. Web. 28 October 2016. <>