Mobile Untitled

Mediums: аluminum, steel.
Location: The National Gallery of Art (Washington, DC, the USA).

The work was created specifically for the building of the Gallery of Art in the city of Washington. Initially, Calder was developing a project with a mechanical engine, but after changing his mind, he made a mobile composition, thanks to the natural airflow of the room. To make the structure light, instead of sheet steel, the sculptor used aluminum, reinforcing the places of greatest tension with molybdenum. The dimensions of the sculpture are so precisely verified that some of its details pass a few inches from the gallery wall when moving, and it seems to the audience that it must inevitably collide with it; however, this does not happen. Alexander Calder usually gave names to his sculptures after they were installed at the intended place, but, unfortunately, the sculptor died shortly before the installation of his large-scale mobile, and his last work was left without a name.