The Career of Philip the Cleric, Younger Brother of Louis VII: Apropos of an Unpublished Charter
The life of Philip the cleric, younger brother of Louis VII of France, is meagerly documented. Philip died young, without having attained high rank in the church - indeed, having refused election to the See of Paris. The documents concerning him are unevenly distributed. The greatest concentration of them is the record of his attestation as a child or youth to charters emanating from the bishop or from the cathedral chapter of Paris, where he had been placed for education as a canon. From his youth or adulthood, there are several references, chiefly in letters, to disputes in which he was involved. He is mentioned in few of the extant acts of Louis VII and almost never in the narrative sources. Only three of his charters and a single reference to a lost act have previously been known.
Lewis, Andrew W. "The Career of Philip the Cleric, Younger Brother of Louis VII: Apropos of an Unpublished Charter." Traditio 50 (1995): 111-127.