Monsignor Pierre d'Ornellas is a French Roman Catholic bishop, known for his role as the Archbishop of Rennes. He was born on March 24, 1954, in Saint-Malo, France. D'Ornellas has been involved in various church activities and has contributed to discussions on social and ethical issues within the Catholic community. He was appointed as the Archbishop of Rennes in 2008 and has since worked to strengthen the church's presence in the region. D'Ornellas is also recognized for his commitment to interfaith dialogue and promoting peace among different religious communities in France.