Andy Warhol was a co-founder and the most important member of the Pop Art movement. In the early 1960s motifs such as 'Campbell's Soup', 'Coca Cola' or 'Jackie Kennedy' and 'Marilyn Monroe', which still remain extremely popular today, made him known to a wide public. They typify his interest in the aesthetics of advertising and consumer society. His work was constantly seeking to break down the boundaries between art and commerce, between commercial and fine art. In addition to appropriating the pictorial language of commercial advertising, he used the technique of silk-screen printing - the reproduction technique of the advertisement business - to produce his works. This work method, institutionalised with the creation of his 'factory', enabled Warhol to depersonalise his art. As a participant in documenta 4, 6 and 7 in Kassel in 1968, 1977 and 1982 and in 1976 as a representative of the USA at the Venice Biennale, Warhol is considered one of the 20th century’s most important artists. His works are to be found in all major international collections and exert a great influence on other artists.