The 1982 portrait, made using Warhol's own urine, will be offered in New York in November, with an estimate in excess of $20m

Angel Pereda was offering paintings and sculptures by the artists to auction houses in New York

“No licence or rights were convened to the seller,” estate says

Drawing is being sold in an auction sponsored by the firm behind David Bowie’s online bank

The 1982 work sold today at Christie's in Hong Kong to an Asian buyer

The 1982 painting will be sold in a single-lot evening sale at Christie's Hong Kong on 23 March with an estimate of $31m to $41m

Exhibition at the Museum of Fine Arts, Boston includes works by Rammellzee, Keith Haring, Kool Koor and Lady Pink

Philip Righter pleaded guilty to selling works fraudulently attributed to Andy Warhol, Jean-Michel Basquiat and Keith Haring, among others

Jean-Michel Basquiat brought in big crowds in Paris—but who beat him to claim the top spot?

First museum survey exploring both artists together to open at the National Gallery of Victoria

Exhibition in upstate New York includes over 100 works, from polaroids to film, some of which are for sale

Artist's 1983 depiction of an infamous case of police brutality goes on display at the Guggenheim Museum in New York in June

Our pick from this week's fairs and auctions

Works were created by the artist when he was sleeping on a friend’s couch in Manhattan

Belinda Neumann-Donnelly claims the work could have made an extra $15m if Hubert Neumann had not tried to block its sale

Rapper P. Diddy identified as buyer of the Chicago-based painter's Past Times

The painting, estimated to bring $30m, is a key lot in the auction house's upcoming evening sale in New York; plaintiff vows to appeal

Critic and curators gather to pay tribute to late artist as 1984 painting comes to market for first time

Japanese collector was catapulted into the limelight when he spent $110m on a Basquiat, which is currently on 'world tour'

Two major shows had been planned but only Centro Cultural Banco do Brasil's is taking place after Masp cancelled

More than 7,000 visitors attended over the closing weekend in London, with overall figures expected to reach more than 215,000

Kenneth Baker on the US artist's survey at the Barbican, which travels to Germany next month

Japanese billionaire has sent his prized 1982 skull painting on “world tour” after buying work at Sotheby’s last year

We survey the top five results in key markets, from Old Masters to Post-war and contemporary

Spring show at Bernard Arnault’s Paris institution includes unseen collection works by artists such as Murakami and Matisse