Sol LeWitt’s work helped to establish both the Minimalist and Conceptual art movements. In the early 1960s, he began to create his first "structures”, a term he used to describe his three-dimensional work. He was heavily inspired by the cube, a form he returned to often in his works. Beginning in the mid-1980s, LeWitt composed his first installations from stacked cinder blocks, and began to work with concrete blocks.

123454321 expresses LeWitt’s approach to minimalist composition. It is a construction of cinder blocks set in a formal arrangement. Each series of blocks is in the proportion 1:1:2. This ratio forms the sequence for the whole structure and is typical of his use of simple numerical systems and serial progressions. The work has a restrained and calculated beauty, which stems from the purity of mathematical principles.

This is the only sculpture by LeWitt in a British landscape open to the public, and is located on a site that he chose personally.