The French ecclesiastical historian Louis Elias Dupin, born in 1657 and descended from a noble family in Normandy, was the author of the illustrious work _La Bibliothèque Universelle des auteurs ecclésiastiques_. Dupin was a learned doctor of the Sorbonne, and professor of the College of France; and he devoted most of his life to his immense work, which is a proof of his marvellous energy and industry. He gives an account of the lives of the writers, a catalogue of their works, with the dates when they were issued, and a criticism of their style and of the doctrines set forth therein. But the learned historian involved himself in controversy with the advocates of Papal supremacy by publishing a book, _De Antiqua Ecclesiae disciplina_, in which he defended with much zeal the liberty of the Gallican Church. He lived at the time when that Church was much agitated by the assumptions of Pope Clement XI., aided by the worthless Louis XIV., and by the resistance of the brave-hearted Jansenists to the famous Bull _Unigenitus_. For three years France was torn by these disputes. A large number of the bishops were opposed to the enforcing of this bull, and the first theological school in Europe, the Sorbonne, joined with them in resisting the tyranny of the Pope and the machinations of Madame de Maintenon. Dupin took an active part with the other theologians of his school in opposing this _Unigenitus_, and wrote his book _De Antiqua Ecclesiae disciplina_ in order to defend the Gallican Church from the tyranny of the Bishop of Rome. In this work he carefully distinguishes the universal Catholic Church from the Roman Church, and shows that the power of the Papacy was not founded on any warrant of Holy Scripture, nor on the judgments of the Fathers. He allows that the power of keys was given to St. Peter, but not to one man individually, but to the whole Church represented by him. The authority of the Pope extends not beyond certain fixed boundaries, and the temporal and civil power claimed by the Papacy is not conjoined to the spiritual power, and ought to be separated from it. This plain speaking did not commend itself to the occupier of the Papal throne, nor to his tool Louis XIV., who deprived Dupin of his professorship and banished him to Châtelleraut. Dupin's last years were occupied with a correspondence with Archbishop Wake of Canterbury, who was endeavouring to devise a plan for the reunion of the Churches of France and England. Unhappily the supporters of the National Church of France were overpowered by the Ultramontane party; otherwise it might have been possible to carry out this project dear to the hearts of all who long for the unity of Christendom. Dupin died A.D. 1719.