If you happen to be making a summer pilgrimage to Documenta this weekend you will have a rare chance to see the celebrated Yvonne Rainer perform one of her dance pieces at the Theater im Fridericianum, in Kassel. Rainer's career is viewed as emblematic of the preoccupations of the American avant-garde -the aesthetics of minimalism and the performance ideas of John Cage being central tenets- until later including minimalist-influenced films into these performances, making them early multi-media experiments. Both Documenta presentations: 'RoS Indexical' and 'AG Indexical, with a little help from H.M.' are being performed as a co-production with New York's performance biennale Performa. The first is a reworking of the controversial premiere of Stravinsky's Le Sacre du Printemps - when performed at the Théâtre des Champs-Élysées in Paris in 1913. The second borrows from Balanchine/Stravinsky's classical ballet Agon as produced in 1957, as an opportunity to analyse, pay homage to, and parody such a classic dance model.