Jean Gerson, chancellor of the University of Paris (died 1429)

Jean Charlier de Gerson was a French scholar, educator, reformer, and poet, Chancellor of the University of Paris, a guiding light of the conciliar movement and one of the most prominent theologians at the Council of Constance. He was one of the first thinkers to develop what would later come to be called natural rights theory, and was also one of the first individuals to defend Joan of Arc and proclaim her supernatural vocation as authentic.

The University of Paris, known metonymically as the Sorbonne, was the leading university in Paris, France, from 1150 to 1970, except for 1793–1806 during the French Revolution. Emerging around 1150 as a corporation associated with the cathedral school of Paris, it was considered the second-oldest university in Europe. Officially chartered in 1200 by King Philip II and recognised in 1215 by Pope Innocent III, it was nicknamed after its theological College of Sorbonne, founded by Robert de Sorbon and chartered by King Louis IX around 1257.

December 13 is the 347th day of the year in the Gregorian calendar; 18 days remain until the end of the year.