a multiplex hologram), a type of hologram that incorporates cinematography to produce a three-dimensional image that appears to move. The integral holograms Forti and Cross made together used imagery of Forti performing solo, except for Huddle (1977), which shows a small group of people performing a Huddle (one of Forti's Dance Construction pieces). The holograms are exhibited in cylindrical form with a light source coming from underneath. The integral holograms Forti and Cross made together were first exhibited in 1978 at the Sonnabend Gallery in New York, in an exhibition titled Simone Forti: Movement Holograms, and continue to be exhibited worldwide. The hologram Striding/Crawling is owned by the Whitney Museum of American Art as part of their permanent collection. The hologram Angel (1977) is owned by the Stedelijk Museum in Amsterdam. Planet at P.S.1 While back in New York, Forti continued to research the movements of animals in captivity, as she had been doing in Rome, visiting both the Central Park Zoo and Bronx Zoo. Julia Bryan-Wilson wrote further about Forti's identifying with zoos animals in 2015, "Rather than turning to animals for a model of 'natural' liberation, Forti came to them out of despair, a shared sense of dislocation, loneliness, and isolation. At the same time, she did not neglect their adaptability, attending closely to their moments of connection and collective recreation. She was constantly aware that their movements were shaped not only by their state of captivity but also by their inner reserves of strength. She mentions, for instance, 'the big cats' compulsive pacing at the fence, which seemed to provide a modicum of relief, and writes that it gave her 'a new view of what it was that I was doing when I was dancing.' Movement is, for the animals as well as for her, a method of control and redirected awareness: 'At times I've escaped an oppressive sense of fragmentation by plunging my consciousness into cyclical momentum.'" Forti's continued interest in these captive animals' movements developed into the large group performance Planet, first performed in 1976 at P.S.1, as part of the exhibition, The Institute for Art and Urban Resources presents Group Works by Simone Forti at P.S.1. In Planet, about forty people performed the movement vocabulary Forti had been developing in her classes, inspired by animal movements Forti observed in zoos. Performers included David Appel, Sally Banes, Pooh Kaye, and Terrence O'Reilly, Nina Martin, Eric