Bertha Dudde (1 April 1891, Liegnitz, Silesia, today Legnica – 18 September 1965, Leverkusen) was a German dressmaker who, by her own account, received "revelations through her inner voice" and wrote them down.
The resulting work of over 9,000 consecutively numbered, dated, handwritten individual revelations on various topics was compiled into collections of writings and translated into other languages.
She only enjoyed the usual elementary school education of the time and practiced her penchant for tailoring at an early age in order to support the family financially.
Translations are available for download in English, French, Dutch, Spanish, Croatian, Polish, Greek, Russian, Romanian and Korean (as of 2022).
The Kundgaben texts claim to be of divine origin and are attributed by their proponents to the New Revelations, to which the partly related work Jakob Lorbers also belongs.