The Collège des Quatre-Nations, also known as the Collège Mazarin after its founder, was one of the colleges of the historic University of Paris. It was founded through a bequest by the Cardinal Mazarin. At his death in 1661, he also bequeathed his library, the Bibliothèque Mazarine, which he had opened to scholars since 1643, to the Collège des Quatre-Nations.