This chapter talks about the Beit Ya’akov (Bais Yaakov), the extensive network of haredi educational institutions for girls that ranged from kindergartens to vocational teacher-training seminaries. It mentions the founder of Beit Ya’akov, Sarah Schenirer, who was labelled the ’mother’ of all haredi women and became an iconic figure as she was the only woman in haredi society to have inspired a foundation myth. It also refers to Dr Leo Deutschländer, who set Beit Ya’akov on a sound financial and pedagogical basis that spearheaded its rapid expansion. The chapter recounts the foundation of Beit Ya’akov in 1918 and the appointment of Rabbi Judah Leib Orlean as its director in 1935, which marked a conservative turn in the development of the institution. It identifies the most influential factors and figures that shaped the development of the Beit Ya’akov network prior to the Holocaust.