Gwen John (1876–1939) was an artist with a singular vision, one whose intense gaze produced some of the most beguiling and atmospheric paintings of the late 19th and early 20th centuries. This concise survey of her life and work places John—often unfairly thought of as a recluse—at the artistic heart of London and Paris. A seminal figure within these circles, her work is reappraised in that context and explored in terms of the alliances and differences John had with her contemporaries. Gwen John’s representation of the female nude, her paintings of interiors, and the effect of her Catholic faith on her work are all discussed. The author also discusses the key relationship between John’s position as a woman artist and her lifelong fascination with the portrayal of the female sitter.