Berthold bishop of Chiemsee, whose original name was Pirstinger, was born in 1465, at Salzburg. He was for some time a canon at Salzburg, and in 1508 was elected bishop of Chiemsee, where he was indefatigable in the reformation of the clergy. He died at Saalfelden, July 19, 1543. He is the author of Tewtsche Theologey, one of the best works of the Middle Ages on scientific theology (latest edition, with notes, a dictionary, and a biography of, Berthold, ed. by W. Reithmeier, with a preface by Dr. Fr. Windishmann, Munich, 1852). He is probably, also, the author of the Opus Ecclesiae, a description of the corruption pervading the whole Church (Landshut, 1524; last ed. 1620). — Pierer, Univ. Lex. 19, 811.