Dan Graham, Public Space/Two Audiences, (1976)
Two rooms, each with separate entrance, divided by a sound-insulating glass panel, one mirrored wall, muslin, fluorescent lights, and wood.
In Public Space/Two Audiences (created for the Biennale di Venezia in 1976), before entering the rooms, visitors agreed to remain in that space for thirty minutes. This period of time, perhaps a little too long for staying in an empty room with other (most likely unknown) viewers, induced one to communicate beyond words, since the spaces, divided by a wall of glass, made any exchange of sounds impossible. There was also a mirror in the back, which duplicated the locale. Minimalism might have had a powerful influence on Graham; however, he took advantage of Minimalism’s structures in very unconventional ways, in this case, creating a nearly invisible environment that spoke resoundingly about it’s own environment and the spectators role within it.