Gwendoline Elizabeth Davies, philanthropist and patron of the arts, was born on 11 February 1882 at Plas Dinam, Llandinam, Montgomeryshire. Gwendoline was very close to her younger sister Daisy. Together they established a Welsh centre to further art and design in 1919. Both sisters moved from Plas Dinam to Gregynog in 1922. Gregynog Press, which was started in 1921, published 42 volumes in English and in Welsh. Gregynog's high standards in design, printing, illustration, binding became well-known. Gregynog also provided training and employment for local people.
The Second World War brought an end to the sisters' book publishing and large-scale music-making ventures at Gregynog, which became a Red Cross convalescent home. When peace came Gwen Davies's deteriorating health prevented a return to the former activities. She died of leukaemia on 3 July 1951 at the Radcliffe Infirmary, Oxford.