Lesser known lots still hold plenty of hammer potential

The formal investigation follows his detainment earlier this week related to an ongoing spat with the art dealer Yves Bouvier

The work was one of 18 to have been placed under a court order following a financial dispute unrelated to the auction

Girl With Balloon was meant to shred completely

Sotheby's directors speak out for the first time since Girl With Balloon was half shredded at auction

Modernist works from the Georgia O’Keeffe Museum will be offered in New York in November

We go behind the scenes of one of the most publicised stunts in auction history with our correspondent Anny Shaw who was there that evening. Then we get a tour of Tate Modern's Anni Albers retrospective with its curator Briony Fer, speak to the artist's biographer Charles Darwent and the head of the Josef and Anni Albers Foundation, Nicholas Fox Weber. Produced in association with Bonhams, auctioneers since 1793.

Girl With Balloon canvas ‘self-destructed’ live at Sotheby’s last week in one of the most publicised stunts in auction history

Just when we thought Frieze week was all over, twists and turns provide high drama at Sotheby’s contemporary evening sale on Friday night

Girl with a Balloon (2006) had just hammered at £860,000

The curvaceous M indicates a work that is "subject to right of first refusal"

The mega-collector’s latest lawsuit, filed in New York, escalates his three-year legal feud with Swiss dealer Yves Bouvier

Our pick from this week's fairs and auctions

Move follows a record-breaking breaking year for Paris auctions in 2017

The auction of art, antiques and works of art was cancelled an hour after its supposed start time following private deal

The auction house hopes the works will surpass previous records by several million

Our pick from this week's auctions and exhibitions

In September 2008, Damien Hirst sold £111m of art as Lehman Brothers collapsed, triggering a financial crisis. A decade on, what has changed?

American collector's works, from Doig to decoy ducks, are to be offered across ten sales at Sotheby’s over the next eight months

Auction house is enlisting dealers and curators to promote the legacy of the polymath who is believed to have cursed his collection

Just two paintings significantly damaged the auction house's bottom line in the second quarter

No big hitters, but overall quality and new buyers from Asia and Latin America buoyed £42.6m auction, with £5.3m record for Canova set in day sale

Veteran Old Master dealer will join the auction house in New York at the end of the summer, months after selling his inventory there

Bronze and marble take centre stage during Old Masters sales week, although Dresden Mars returns home without going on the block at Sotheby's

Maurizio Seracini concurs that the painting sold by Sotheby’s in 2012 is a modern forgery

Christie’s introduces day sale format and established names give way to new talent

Artist was 80 years old when he began the painting of a former Tate cataloguer

Sotheby's sale fell below estimate while Christie’s provided some cheer, showing there is still money in Monet – but only the right one

Sotheby’s auction includes personal works by Hirst gifted to Dunphy, or sketched on the back of restaurant menus

Dmitry Rybolovlev's $450m windfall from Salvator Mundi sale undermined fraud allegation, report says, but criminal cases against Bouvier in Europe are ongoing