These bronze heads may be the most known of public art currently on display. Many of the images in news media show just a few of the sculptures. This photo from the Telegraph shows the context for Ai Wei Wei: Zodiac Heads:

http://www.telegraph.co.uk/culture/art/7723579/Art-gallery-preview-in-pictures.html?image=1

The vast majority of people viewing this body of work will not be in direct contact but nonetheless have a relationship with it. What does it mean to engage with art this way… through the lens of a camera and the screen of a computer?