[1] She used her husband's name (Christian) instead of her own, as a nom de plume to avoid any prejudices against her work as a woman.
[2] Mostly known for her early support for artists associated with Arte Povera, Stein's work fostered the careers of artists like Luciano Fabro, Jannis Kounellis, Francesco Lo Savio, Mario Merz, Giulio Paolini, Michelangelo Pistoletto, Giovanni Anselmo, Gilberto Zorio, Piero Gilardi, Pino Pascali, Giuseppe Penone and Marisa Merz and other important post-WWII artists like Piero Manzoni, Lucio Fontana, Ettore Colla and Mimmo Rotella.
[3] The program of the gallery expanded to show more international artists, including Richard Serra, Gilbert & George, Jeff Wall, and Claes Oldenburg among others.
In 2010, an exhibition and catalogue titled Collezione Christian Stein: A History of Italian Art, was organised by Jean Louis Maubant and Francisco Jarauta Marión at the Museo Cantonale d'Arte in Lugano.
[13] A large part of the collection of Margherita Stein was donated to the Castle of Rivoli Museum.