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Alexander Calder
East Building Ground Level

Overview: Alexander Calder's 76-foot-long mobile, the icon of the Gallery's East Building that has gracefully presided over its central court for twenty-seven years went back on view June 7, 2005, after undergoing conservation treatment. National Gallery staff and engineers, including artist-engineer Paul Matisse, the grandson of Henri Matisse and a close friend of Calder's, disassembled the 920-pound sculpture in April 19, 2004 so that its multicolored parts could be cleaned and its metal surfaces repaired. At the same time, work is being done on the hanging mechanism that is secured to the atrium roof. More than forty staff members are involved in the numerous stages of this extensive project.

Calder created his first moving abstract sculptures or "mobiles" in the early 1930s. Using an ingenious system of weights and counterbalances, he eventually designed constructions that moved freely when suspended, powered only by slight air currents. The work he created for the East Building, Untitled, 1976, is by far the largest example of this type of motorless construction.

In 1972, when the East Building was still under construction, Calder was asked to create a large mobile that would visually anchor the structure's monumental atrium. Originally planned in steel, the sculpture's thirteen panels and twelve arms were too heavy to function as the artist intended. Paul Matisse translated the design into an aluminum construction that retained the look and dynamism of Calder's original maquette. The mobile is now constructed of aluminum honeycomb panels, hollow aluminum tubes, and very little steel. Calder's last major work of art, it was installed on November 18, 1977, one year after his death.

Passes: Admission is always free and passes are not required.

Image: Alexander Calder, Untitled, 1976, aluminum and steel, Gift of the Collectors Committee, 1977.76.1