Work acquired by Van Gogh Museum in Amsterdam and the Drents Museum in Assen is one of few to survive from the artist's visit to Drenthe

The newly private auction house led the night's lots with its known money-maker Claude Monet, and set a world record for the Polish artist Tamara de Lempicka

Can the quality of the smaller works coming up during "gigaweek" quell economic jitters?

If not immune to geopolitical unrest, then perhaps art is a refuge for money that is struggling to find its way into other assets

The $250,000 prize money will be shared between several São Paulo organisations

One of the works was looted by the Nazis from Jewish collector Jacques Goudstikker, but is now being sold by his heir after restitution

Smith leaves after four and a half years with a $28.2m severance deal, including $16.9m in shares, and will remain as a senior adviser to Stewart

Jose Mugrabi and Antoine Arnault among collectors bidding at "white glove" sale of works by François-Xavier and Claude Lalanne

Our pick of highlights from the next fortnight's auctions and fairs

Nicole Eisenman, Jean-Michel Basquiat and a dozen Italians help weather the Brexit storm

Chief financial officer Michael Goss is replaced by Jean-Luc Berrebi per the terms of the merger, which sees shareholders compensated $57 per share

Preparatory sketch for The Triumph of Caesar will go on sale in New York in January

Our pick of highlights from the next fortnight's auctions and fairs

Our pick of highlights from upcoming auctions and fairs

With 91% of shareholders in favour, the publicly traded auction house will officially go private after three decades on the New York Stock Exchange

Trump's tariff of 15% on Chinese art that went into effect 1 September also applies to the antiquarian trade, further frustrating dealers and auction houses

Auction house says such litigation is “routine in the US”, with deal expected to be completed by the end of the year

A data study by Sotheby's Mei Moses reveals a 73% increase for work by women in repeat sales, while men lagged at 8%

Sale to telecoms magnate Patrick Drahi looks set to go ahead as firm makes up for a loss in revenue through increased commissions and more efficient guarantees

Lawsuits argue that information filed to the SEC is inadequate

Security guards and specialists alike appraise each others works for selling exhibition to support Mind UK

The appointment comes after a handful of new hires across the auction house’s offices

Exhibitions and events at museums and galleries worldwide proves we are still looney for the Moon 50 years after setting foot on it

During London's Classic Week, we take a look at what the same sum will buy you at either end of the art historical timeline

Five lots from the DFS founder Graham Kirkham's collection made up almost half of the value of the £56.3m London sale, which was led by a late Turner