Ai Weiwei - Untitled, 2011 (courtesy the artist, © 2011 Ai Weiwei)

Ai Weiwei – Untitled, 2011 (courtesy the artist, © 2011 Ai Weiwei)

Tomás Saraceno - Cloud City, 2011 (Courtesy the artist © 2011 Tomás Saraceno)
Tomás Saraceno - Cloud City, 2011 (Courtesy the artist © 2011 Tomás Saraceno)

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