Jean du Cros was a 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...

 of the Catholic Church. He was bishop of Limoges in France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 (1347–1371).

He was made cardinal-priest of SS. Nereo e Achilleo on 30 May 1371 by his uncle, Pope Gregory XI. Then, he became grand penitentiary (1373) and cardinal-bishop of Palestrina (28 September 1376). Initially, he supported the election of Pope Urban VI

Pope Urban VI

Pope Urban VI , born Bartolomeo Prignano, was Pope from 1378 to 1389.-Biography:Born in Itri, he was a devout monk and learned casuist, trained at Avignon. On March 21, 1364, he was consecrated Archbishop of Acerenza in the Kingdom of Naples...

 in April 1378, but shortly thereafter, he adhered to the obedience of Antipope Clement VII

Antipope Clement VII

Robert of Geneva was elected to the papacy as Pope Clement VII by the French cardinals who opposed Urban VI, and was the first Avignon antipope of the Western Schism.-Biography:...

 and served as his legate in France. He died in Avignon

Avignon

Avignon is a French commune in southeastern France in the départment of the Vaucluse bordered by the left bank of the Rhône river. Of the 94,787 inhabitants of the city on 1 January 2010, 12 000 live in the ancient town centre surrounded by its medieval ramparts.Often referred to as the...

.http://www.fiu.edu/~mirandas/bios1371.htm#Cros