Bertha Eckstein-Diener

Bertha Eckstein-Diener (18 March 1874, Vienna – 20 February 1948, Geneva), also known by her American pseudonym as Helen Diner, was an Austrian writer, travel journalist, feminist historian and intellectual. Her book Mothers and Amazons (1930), was the first to focus on women's cultural history. It is regarded as a classic study of matriarchy.

She was a member of the "Arthurians," a group of European intellectuals active in the 1930s, each of whom adopted a name from Arthur's Round Table (Diner was Sir Galahad). Each member undertook to research an area of knowledge hitherto little known to Western culture. Diner set out to document a feminist history of women, and infused her book Mothers and Amazons (Mütter und Amazonen) with lyrical and poetic language.