Louise Catherine Breslau (6 December 1856 – 12 May 1927) was a German-born Swiss painter, who learned drawing to pass the time while bedridden with chronic asthma.

She studied art at the Académie Julian in Paris, and exhibited at the salon of the Société Nationale des Beaux-Arts, where she became a respected colleague of noted figures such as Edgar Degas and Anatole France.

[1] In 1858, when Breslau was two years old, her father accepted the position of professor and head physician of Obstetrics and Gynecology at the University of Zurich, and the family moved to Switzerland.

In the late 19th century young bourgeois ladies were expected to be educated in the domestic arts including drawing and playing the piano.

By 1874, after having taken drawing lessons from a local Swiss artist, Eduard Pfyffer (1836–1899), Breslau knew that she would have to leave Switzerland if she wanted to realize her dream of seriously studying art.

Shortly afterwards Breslau had changed her name to Louise Catherine, opened her own atelier, and was becoming a regular contributor and medal winner at the annual Salon.

Zillhardt inherited Breslau's estate and later donated sixty of the artist's pastels and drawings to the Musée des Beaux-Arts in Dijon.