The father of conceptual art, Sol LeWitt has dedicated his life to the search for form in space. Before devoting himself entirely to his art, LeWitt worked as a graphic designer for the architect IM Pei between 1955-1956, which later inspired the architectural reference in his work. In the mid-1960s, LeWitt created his first wall drawings, a dialogue between plastic art and architectural space, an approach that would remain at the heart of his artistic project. The artist uses an infinite variety of techniques and formats to create primary geometric forms. Like the cube, the pyramid became a recurring theme in his art, in wall drawings as well as in graphic art and sculpture. Isomorphic triangles intersect and separate on uniform, infinite backgrounds, a metaphor for the materialisation of the idea in the artist's thinking. By exploring ideas rather than conventional aesthetics, LeWitt redefined art production. He was fascinated by series and therefore by the idea of creating a system in his artworks through these series. Today, his works are in collections such as the Art Institute of Chicago, the National Gallery of Art in Washington, D.C., the Tate Gallery in London, the Dia Art Foundation in Beacon, NY, and the Walker Art Center in Minneapolis.