A retrospective of Craig-Martin's work took place at the Whitechapel Gallery in London in 1989. In 2006, the Irish Museum of Modern Art presented "Michael Craig-Martin: Works 1964–2006" which included works from over 40 years of Craig-Martin's career. The exhibition showed around 50 paintings, sculptures, wall drawings, neon works and text pieces by the artist, covering everything from his sculptures to digital works. One of his works called "On the Table" (1970) involved four metal buckets suspended on a table, exemplifying the influence of Minimalism and Conceptualism on Craig-Martin. "An Oak Tree" (1973), consisting of "an ordinary glass of water on an equally plain shelf, accompanied by a text in which Craig-Martin asserts the supremacy of the artist's intention over the object itself ... is now widely regarded as a turning point in the development of conceptual art".