Robert Smithson’s Untitled (1964) is a large crystalline wall sculpture made of steel and mirrored plastic. Its angled rose-colored mirrors reflect the surrounding architecture and one another, fragmenting and multiplying the space around the sculpture.

In a related drawing, Three Works in Metal and Plastic (1964), Smithson describes the sculpture as creating a “Double vanishing point” and “Infinity without space.” He notes that within its angled mirrored surfaces the “floor is reflected over ceiling” and “the entire room that the piece is in, is absorbed by the piece.”

Smithson was experimenting at this time with crystalline structures, mirrored surfaces, and the relationship between sculpture and its surroundings. In “A Short Description of Two Mirrored Crystal Structures” (1965), he writes that “‘Space’ is permuted into a multiplicity of directions,” describing it as simultaneously “crystalline and collapsible.”

The sculpture is made of steel, paint, and polymethyl methacrylate (commonly referred to as acrylic or the name brand Plexiglas; in the drawing Smithson calls this material “glowing rose mirrors also called ‘neon’ plastic”). The photograph shows Smithson in his Greenwich Street studio with this sculpture on the wall. He is seated at a table sculpture, and to his right is a related bright yellow sculpture, both held in the Holt/Smithson Foundation collection.