This portrait of Bertha von Suttner brings us to study sources traditionally not considered relevant within the scope of international legal history. That is, female diaries and a bestselling novel, 'Die Waffen Nieder!' (1889), which has a female protagonist. Not allowed access to the formal sessions of the 1899 and 1907 Hague Peace Conferences, Von Suttner resorted to a typical female practice to influence intellectual and political debates. As 'Salonnière' in the Hague during these Conferences, she created an informal social space for frank conversations among the small cosmopolitan elite of diplomats, journalists and international legal experts to influence negotiations and to contribute to the ‘peace through law’ project. Locating international law in her novel and Salon, this portrait connects loosely with a more socio-legal and materialist approach to international legal history. It shows Suttner held a rather well-developed - and at times fairly sceptical - outlook on international law.