[2] In addition to her academic work, Braun serves as the curator of the Leonard A. Lauder Collection of Cubist Art.
She has written extensively on the work of European modern artists, including Gustav Klimt, Georges Braque, Pablo Picasso, and Alberto Burri among others.
[4] She is the author of Mario Sironi and Italian Modernism: Art and Politics under Fascism, published by Cambridge University Press in 2000, which The Journal of Modern History described as "a work that is as indispensable for cultural historians of twentieth-century Europe as it is for historians of the visual arts”.
[8] In 2014, she co-organized the exhibition of Lauder's holdings of Cubism at The Metropolitan Museum of Art in New York together with Rebecca Rabinow.
Dubbed by The New York Times as "one of the world's greatest collections of Cubist art," it includes 81 works by Pablo Picasso, Georges Braque, Fernand Léger, and Juan Gris.