Louise Catherine Breslau (Munich, December 6, 1856 – Paris, May 12, 1927) was a German/Swiss artist. Born Maria Luise Katharina Breslau in Munich, Germany, she spent her childhood in Zurich, Switzerland and as an adult made Paris her home. Suffering from asthma all her life, Breslau turned to drawing as a child to help pass the time while confined to her bed. Although she became one of the most sought after portraitists of her time, after her death she and her work were all but forgotten. It has only been in the past few years that interest in Breslau and her works has been growing.