[2][4] Katharina Bierbaumer was a member of the Germanic Order and the Thule Society,[5] as well as the main shareholder of the publishing house Franz Eher Nachfahren in Munich.
On 14 September 1918, her name was entered in the commercial register as the owner of the publishing house Franz Eher Nachfahren with the address Parkstraße 335 in Bad Aibling.
[7] On 17 December 1920, the NSDAP acquired the paper from its eight owners via the front man Anton Drexler for 120,000 marks, before ownership was then transferred to Adolf Hitler in November 1921.
[10] Käthe Bierbaumer was interned for several years as an Enemy alien on the Isle of Man and in the United Kingdom under the registration number 1388.
Her last address outside the United Kingdom was the Pension Ville Frey in Bern and she is also known to have left Munich using forged documents with the signature of the commander of the Red Guards.
However, she appears to have been interned later, as she was allowed to leave Rushen Camp on 11 November 1940, to attend court in Douglas and the Home Office Advisory Committee.