Margrethe Mather (4 March 1886 – 25 December 1952) was one of the best-known female photographers of the early 20th century. Initially, she influenced and was influenced by Edward Weston while working in the pictorial style, but she independently developed a strong eye for patterns and design that transformed some of her photographs into modernist abstract art. She lived a mostly uncompromising lifestyle in Los Angeles that alternated between her photography and the creative Hollywood community of the 1920s and 1930s. In later life she abandoned photography, and she died unrecognized for her photographic accomplishments.