 The Frahm brothers have collaborated with artist and activist Ai Weiwei.Frahm's own collection draws on post-war European abstract art, as well as art from the late 1970s to the present, and incorporates both emerging and established artists from America, Europe and Asia.According to Frahm, his collection includes artists such as Cindy Sherman, Richard Prince, Ai Weiwei, Julian Schnabel, Yoshitomo Nara, Takashi Murakami, Zeng Fanzhi and Sigmar Polke.