Johann Geiler von Kaisersberg

Johann Geiler von Kaysersberg (16 March 1445 – 10 March 1510) was a Swiss-born priest, considered one of the greatest of the popular preachers of the 15th century.

He was closely connected with the humanists of Strasbourg, whose leader was the well-known Jacob of Wimpheling (1450–1528), called "the educator of Germany". Like Wimpheling, Geiler was a secular priest; both fought the ecclesiastical abuses of the age, but not in the spirit of Martin Luther and his adherents. They looked, instead, for salvation and preservation only in the restoration of Christian morals in Church and State through the faithful maintenance of the doctrines of the Church.

He was born at Schaffhausen, but from 1448 passed his childhood and youth at Kaysersberg in Upper Alsace. His grandfather, who brought him up, lived there. The father was killed by a hunting-accident when Geiler was three years old; and his grandfather took charge of the education of the child, sending him to the school at Ammerschwihr, near Kaysersberg, where his mother lived.

In 1460, when he was fifteen years old, Johann entered the University of Freiburg; which had just opened. Two years later he received the baccalaureate, and after two more years was made Master of Arts. He now gave lectures on various writings of Aristotle in the next semester. After graduation, he lectured there for some time on the Sententiae of Peter Lombard, the commentaries of Alexander of Hales, and several of the works of Aristotle. He filled the office of dean of the philosophical faculty for a brief period

A living interest in theological subjects, awakened by the study of John Gerson, led him to the University of Basel in May 1471, recently founded at that time. He obtained the doctorate in 1475. At Basle he became acquainted with Sebastian Brant, with whom he formed a lasting friendship. While at Basle, Geiler preached his first sermons in the cathedral. The magistracy and citizens of that city obtained his appointment to the Freiburg University, of which he was elected rector the next year.

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