Based on this, the encyclopedia puts his birth around 1210, and his origin as a well-to-do middle-class family of Ratisbon named Sachs.
The first fixed date in Berthold's life is 1246, when the papal legate appointed him and David of Augsburg as inspectors of the convent of Niedermünster.
Over the following decade and a half, Berthold preached throughout the valley of the Rhine, Alsace and Switzerland, and then eastward into Austria, Moravia, Bohemia and Silesia.
He was called "sweet Brother Berthold", "the beloved of God and man", "a second Elias", "the teacher of the nations"; all of these expressions are proofs of the high esteem in which his activities were held.
[1] The discourses thus preserved are of the greatest importance for the history of the development of the literature of homiletics; they are of equal value as rich sources for determining the condition of education and culture in the thirteenth century.