  During the 1930s the Institute for Social Research, by this point under the directorship of Horkheimer and exiled from its base in the University of Frankfurt, provided Benjamin with important opportunities for publishing as well as an increasingly necessary financial stipend.  Theodor W. Adorno, who had been introduced to Benjamin a decade earlier by a mutual friend, Siegfried Kracauer, was instrumental in securing this support. An important consequence of this dependence, however, was the editorial revisions to which key essays in which Benjamin developed his materialist theory of art were subjected, such as ‘The Work of Art in the Age of Its Technical Reproducibility’ and those on Baudelaire and Paris that grew out of The Arcades Project.