 By 1532 , Calvin received his licentiate in law and published his first book , a commentary on Seneca 's De Clementia . After uneventful trips to Orléans and his hometown of Noyon , Calvin returned to Paris in October 1533 . During this time , tensions rose at the Collège Royal ( later to become the Collège de France ) between the humanists / reformers and the conservative senior faculty members . One of the reformers , Nicolas Cop , was rector of the university . On 1 November 1533 he devoted his inaugural address to the need for reform and renewal in the Catholic Church . 
