| Honorific Prefix: | Blessed |
| Petrus Guérin du Rocher | |
| Birth Date: | 1 March 1731 |
| Feast Day: | September 2 |
| Venerated In: | Catholic Church |
| Birth Place: | Sainte-Honorine-la-Guillaume, France |
| Death Place: | Carmes Prison,Paris, France |
| Beatified Date: | 17 October 1926 |
| Beatified Place: | Saint Peter's Basilica, Kingdom of Italy |
| Beatified By: | Pope Pius XI |
Petrus Guérin du Rocher should not be confused with Robert Guérin du Rocher.
Petrus Guérin du Rocher was born in Sainte-Honorine-la-Guillaume in 1731.[1] He was a priest of the Jesuits.[2] He taught philosophy at Bourges in 1762, before travelling around Italy, Germany and Poland, developing theories of biblical Exegesis, which contradicted the Encyclopédistes.[3] His work saw him become director of a house of new converts in Paris and Queen Marie Antoinettechose him as her Confessor.[3]
On the 2nd September 1792 he was one of the priests, along with his brother Robert Guérin du Rocher killed by a mob in the September Massacres.[4] [5] 134 years later, he and his fellow Holy September Martyrs were beatified by Pope Pius XI in October 1926[6]