Galería Guillermo de Osma is a contemporary art gallery based in Madrid, founded in 1991 by Guillermo de Osma. The gallery is internationally recognized for its scholarly focus on Spanish modern and postwar art, with particular attention to movements such as Surrealism, Constructivism, and abstraction, as well as key figures of the Spanish avant garde.

The programme combines historical exhibitions with rigorous research and publications, often drawing on archival material to reassess the work of influential artists and movements. Through close collaboration with museums, private collections, and international art fairs, Galería Guillermo de Osma plays an important role in promoting a deeper understanding of Spain’s modern artistic heritage within a global art historical context.