Tate Modern, Turbine Hall. Free. The Unilever Series: an annual art commission sponsored by Unilever. Tino Sehgal presents the 13th commission in The Unilever Series for Tate Modern’s Turbine Hall. Sehgal has risen to prominence for his innovative works which consist purely of live encounters between people. Avoiding the production of any objects, he has pioneered a radical and yet entirely viewer-oriented approach to making art. His works respond to and engage with the gallery visitor directly, creating social situations through the use of conversation, dance, sound and movement, as well as philosophical and economic debate. The commission will be part of the London 2012 Festival, the culmination of the Cultural Olympiad.