in harnesses moving along a wall, while Roof Piece took place on 12 different rooftops over a ten-block area in New York City's SoHo, with each dancer transmitting the movements to a dancer on the nearest roof. In 1974, Brown began a residential relationship with the Walker Art Center in Minneapolis, MN, that has continued to this day. With 1978's Accumulation with Talking plus Watermotor, a complex solo combining elements of three other pieces, she demonstrated a mental and physical virtuosity seldom seen in the dance world, then or now. Brown's rigorous structures, combined with pedestrian or simple movement styles and tongue-in-cheek humor brought an intellectual sensibility that challenged the mainstream "modern dance" mindset of this period. During the 1980s Brown produced large-scale works intended for the stage and began her artistic collaborations, beginning with Glacial Decoy (1979) which had sets and costumes by artist Robert Rauschenberg. This period was most notable for the slithery and highly articulated movement style which characterized much of her work during this time. The Molecular Structure cycle, which included Opal Loop (1980), Son of Gone Fishin (1981) and another collaboration with Rauschenberg, Set and Reset (1983), featuring a score by performance artist Laurie Anderson and a set design by Rauschenberg, solidified Brown's stature as an innovator within the dance world and as an artist of global significance. Three screens simultaneously broadcast separate black and white film collages from five 16 millimeter projectors (more than 20 years before a video component became the norm in new choreography), while the dancers rippled around the stage in part-translucent costumes marked with gray and black figures that resembled newsprint. Unlike Merce Cunningham and John Cage, who worked separately on projects and left it to the viewer to put the elements together, Brown and her collaborators worked toward a shared vision. Sculptor Nancy Graves designed the set for Lateral Pass, (1985), which began Brown's Valiant cycle. It used a larger pad, bolder movement phrases to articulate Brown's evolving spatial aesthetics. This led to Newark (1987), with decor and a sound concept by Donald Judd. For Astral Convertible (1989) and Foray Forêt (1990), costumes and sets were once again made by Rauschenberg. Astral Convertible, in particular, originally was commissioned by the National Gallery of Art in Washington, D.C., as part of a major Robert Rauschenberg exhibition in 1991 and presented on the museum's steps, overlooking the National Mall. Performances of