Luisa, Marchesa Casati Stampa di Soncino (23 January 1881 – 1 June 1957), also known as Luisa Casati, was an Italian heiress, muse, and patroness of the arts in early 20th-century Europe known for her eccentricities. As the concept of quaintrelle was re-developed, Marchesa Casati fitted the utmost example by saying: "I want to be a living work of art".