and Compression Line (1968/2016) at Glenstone, Potomac, Maryland. In the early 1970s, Heizer began work on City, an enormous complex in the rural desert of Lincoln County, Nevada. His work on the project continues to this day, supported by the Dia Art Foundation through a grant from the Lannan Foundation. Limited public access to City began in 2022. A campaign to have the Basin and Range area around City designated as a national monument to protect it from development took place, and a group of American museums, including the Los Angeles County Museum of Art (LACMA), the Museum of Modern Art, the Institute of Contemporary Art, Boston and the Walker Art Center, have joined to draw public attention to a petition urging preservation of the area. In July 2015, President Barack Obama signed a proclamation (using his authority under the Antiquities Act of 1906) creating the Basin and Range National Monument on 704,000 acres in Lincoln and Nye counties, an area including Heizer's City. Heizer's artworks are represented in museum collections and public spaces worldwide. Major permanent commissions Tangential Circular Negative Line (2012), Mauvoisin, Switzerland, an Air&Art Foundation commission directed by Jean Maurice Varone Levitated Mass (2012), Resnick Pavilion North Lawn at LACMA, Los Angeles, California Effigy Tumuli (1985), Buffalo State Park, Ottawa, Illinois 45 Degrees, 90 Degrees, 180 Degrees (1984), Rice University, Houston, Texas Levitated Mass (1982), 590 Madison Avenue, New York. EJM Equities Collection, New York North, East, South, West (1982), 5th and Flower Streets, Los Angeles Other works Isolated Mass/Circumflex (#2) (1968–72), Nine Nevada Depressions, Menil Collection, Houston, Texas Rift # 1 (1968–72; deteriorated), Nine Nevada Depressions, Massacre Dry Lake, Nevada Windows and Matchdrops (1969), seven small rills in the floor in front of the Kunsthalle Düsseldorf entrance, Germany Displaced/Replaced Mass 1, 2 & 3 (1969), Silver Springs, NV. No longer extant. Double Negative (1969–70), located near Overton, Nevada Dragged Mass (1971), Detroit Institute of Arts, Detroit City (1972, completed 2022), Lincoln County, Nevada Adjacent, Against, Upon (1976), Myrtle Edwards Park, Seattle, Washington This Equals That (1980; removed), Michigan State Capitol Complex, Lansing, Michigan North, East, South, West (1967/2002), Dia:Beacon, Beacon, New York Exhibitions In 1968, Heizer was included in Earth Works, the influential group show at Virginia Dwan's gallery, and then in the Whitney Museum painting annual in 1969, where his contribution was a huge photograph of a dye painting in the desert. For his first