Corderius (Latinized form of the name Mathurin Cordier; c. 1479 – 8 September 1564), was a French-born theologian, teacher, humanist, and pedagogian active in Geneva, Republic of Geneva. He taught at the School of Lausanne (now the University of Lausanne), where he was a director. Studies Cordier was born to a peasant family in La Perrière, Normandy. He completed his theological studies at Paris. Once he was a priest he exercised his ministry at a parish of Ruan and continued his studies, especially focused on grammar. Teaching at France He gave up his priestly functions near 1540 when Paris, having heard of his competence, called him for teaching grammar in diverse locations. In 1523, Cordier was admitted to the College of la Marche as the Chair of Rhetoric. He taught John Calvin, and Calvin dedicated his Commentaries on the Epistle to the Thessalonians to him. In 1528 Cordier took charge of the Grammar School of Navarre. He taught in various locations in France, never stopping at any city for a long time. In 1553, while he was directing the School at Nevers, he came back to Paris where he met Robert Estienne. Estienne was a lexicographer and Protestant printer, who edited the works of Mathurin Cordier and convinced him to convert to Protestantism. He married Thomasse Pelet, and they had a daughter named Suzanne. Exile in Switzerland: Geneva and Neuchâtel Denounced for his ideas, Corderius fled France in 1536 or 1537 and took refuge in the Republic of Geneva. There he taught alongside Calvin and William Farel. Corderius was in charge of a class in the School of de Rive. Over the next few years he saw rising hostility toward Protestants. He left the city and joined William Farel in Neuchâtel. Corderius was named as the director of the schools of the town. Teaching at Lausanne In October 1545 the Vaud appointed Corderius as director the School of Lausanne. He held that position 1545 to 1547. At the same time, Corderius was a teacher and director at the "Twelve," a boarding school. The state paid for the living costs of the pupils, who were allowed to confess or go on with their ministries. The boarding school was suppressed in 1587, same year the Academy was inaugurated. The state granted Corderius a retirement pension in recognition of his 12 years of service. During this period Pierre Viret acted as Corderius' pastor.