Jablonka, Cologne

Four people are responsible for establishing whether works by the artist are authentic. Their decision is final. Now they are under attack by collectors who say they have ulterior motives for rejecting works

5-minute portraits exploring the cult of celebrity

These never-before-seen works show a more personal side of the artist

Problematic Warhols hinder Christie’s but Sotheby’s sparkles with Richter Riley, Barceló and Flanaghan

C&M Arts, Gagosian Gallery, and Paul Kasmin all jump on the bandwagon

A number of small shows devoted to the artist have opened across the city

The blockbuster show comes to the US via London

Centro de Arte Reina Sofía plays host to three big names on one canvas

The high camp survivor who was friends with all the legends

Leading dealer throws party for Tate’s Andy Warhol show

These paintings re-emphasise the artist's genius for cropping and editing his images for maximum impact

The Art Newspaper reviews the "Mario Testino, Diana's favourite photographer" (BBC), "Andy Warhol: the complete picture" and the Citibank Private Bank Photography Prize 2002 (Channel 4)

You can own a piece of history for only $7 million

Wayne Koestenbaum's new book looks at Warhol's films

This show has been in Berlin, and will next travel to Los Angeles

The foundation has licensed Warhol imagery for around 13 years

At the close of the century, Tate Modern looks back at one of the biggest names in 20th-century art

Mao was perceived as an icon by Warhol

Photographs by the wigged Sphinx of Manhattan are published by his old dealer

Or your very own “Warhol” portrait for $265

Gary Hume, Sam Taylor-Wood and Cecily Brown prove that it’s never too soon to be an auction star

Russia’s first Andy Warhol exhibition has opened at the State Hermitage Museum

It will comprise of six volumes, beginning with his production from 1961 to 1963

The exhibition will visit Hungary, Greece, Russia and Estonia this year and Slovakia, Slovenia, Latvia and Croatia in 2001

The upcoming Met exhibition presents the whole career of the photographer famous for his images of the Depression

Air-raising adventures in Berlin, the mythology of Andy Warhol on screen, and The ArtClub hitting its stride at London visual art events

The museum is set to be completed by 2001

“Andy Warhol: A Factory”, Kunsthalle at Karlplatz, Vienna, 5 February-2 May

His record price may bolster the market, but not all artists surpassed expectations