«French artist Sophie Calle’s (b.1953) blending of artistic strategy with daily life is one of the most compelling realizations of conceptually led photography. For six days, Calle ate a diet of food of a single colour. This combination of artistic strategy and daily life is the hallmark of the French artist’s imaginative work.»

«The precedents for conceptual artists of the 1960s and 1970, were created in the early twentieth century by French artist Marcel Duchamp (1887-1968). […] In 1917, the father of conceptual art – as he is often called – submitted a factory-made urinal to the Armory Show […] on the basis that art could be anything the artist designated it to be […]Today, only photographs remain of the original Fountain, taken by Alfred Stieglitz (1864-1946).»