Pierre de Bar was a French Cardinal

Cardinal (Catholicism)

A cardinal is a senior ecclesiastical official, usually an ordained bishop, and ecclesiastical prince of the Catholic Church. They are collectively known as the College of Cardinals, which as a body elects a new pope. The duties of the cardinals include attending the meetings of the College and...

. He is also tentatively identified as a scholastic philosopher, at the University of Paris

University of Paris

The University of Paris was a university located in Paris, France and one of the earliest to be established in Europe. It was founded in the mid 12th century, and officially recognized as a university probably between 1160 and 1250...

 around 1230. Some sources indicate that he entered Cistercian Order but more recent research conclude that he was secular priest. He was chancellor of the diocese of Noyon from 1232 until his promotion to the cardinalate.

He was created cardinal by Pope Innocent IV, initially as priest of S. Marcello on 28 May 1244, and then as cardinal-bishop of Sabina in 1251/52, shortly before his death. He subscribed papal bulls between 27 September 1244 and 12 June 1252. His election to the see of Noyon in 1250 was not ratified by Innocent IV.

There is a portrait of him with Mary Magdalen, by Giotto, in the basilica of San Francesco, Assisi.