BUM was created just before Boty died of cancer aged 28 in 1966

Journals and other personal effects were discovered at auction house, reports say

Franz von Stuck’s portrait of two girls was due to be sold at Van Ham

Our pick of highlights from upcoming auctions

Aboriginal work, Earth’s Creation I, was shown at the 2015 Venice Biennale

Capping an epic week of auctions, solid results featuring records for female artists and a Ferrari bode well for market's future—so long as it doesn't overheat

Dorotheum sale piques interest, pre-empting centenary of the artist’s death next year

Despite buy-ins, the sale saw several strong prices and records below the dizzy height of $450.3m for Leonardo da Vinci's Salvator Mundi

Price makes it the most expensive painting of all time

New York sale results boosted by strong Asian and Russian buying, and shored up by guarantees

Van Ham to offer Franz von Stuck portrait in 17 November sale

Auctioneer Claude Aguttes will sell the collection of historic books and manuscripts across 300 sales over at least six years as part of liquidation

Pent-up demand for top material kicks off New York's key auction week, with a $81.3m Van Gogh and records for Léger, Magritte, Man Ray and Vuillard

Our pick of this month's most interesting auctions

Proceeds from Berlin sale, which also includes works by Rosemarie Trockel and Tomás Saraceno, will benefit Kayany Foundation

Discretionary sellers gain confidence in the market and Christie's leads its contemporary sale with Da Vinci—but recent overreaches sound a cautionary note

The successful Hail Mary pass came just before deaccessioned works, including two paintings by Norman Rockwell, were due to be auctioned at Sotheby’s on Monday

Our pick of highlights from upcoming auctions

A judge in Massachusetts has denied two motions to block next week’s auctions of deaccessioned works

Led by a major Man Ray, auctions at Christie's, Sotheby's and Leclere play to sophisticated collectors in town for the Paris Photo fair

Last sold 50 years ago, A Dawn depicts French troops marching to trenches through Flanders in 1914

Our pick of highlights from upcoming auctions

Two works by their father are among 40 that were due to be sold by the Berkshire Museum

Houses beef up digital teams by hiring from the fashion industry in a bid for new revenue streams

Once overlooked as regional artists, West Coast pioneers have emerged from the shadows since the first edition of Pacific Standard Time in 2011

In the bricks-versus-clicks shakeout, the new power players in online auctions are harvesting data from both the supply and demand sides

Long established London jewellers will hold sale at Sotheby’s following move to smaller premises, but director insists it is “business as usual”

Our pick of highlights from upcoming auctions

What will happen when the only painting in private hands by the Renaissance master heads to auction? Plus: the New Museum's big new show on gender, and our literary editor talks 18th-century princesses

The painting, presumed lost until 2005, is estimated at $100m