The portraits painted by Bartholomäus Zeitblom carry an estimate of £400,000-£600,000

Auction house is in “consultation period” ahead of redundancies, sources say

The auction house's global chairman will leave at the end of the month

The large-scale investment vehicle raises major questions about who gets to decide where, how and to whom art circulates

The 114-year-old iron sculpture of a steam locomotive was stolen from the roof of a train station in 1983

Exploring Now You See Us, which celebrates the output of Vanessa Bell, Mary Beale and many more, plus conversations about Dia’s legacy and the ’visual linguist‘ Wong

The results were led by Monet's 'Meules à Giverny' and Leonora Carrington's record-breaking 'Les Distractions de Dagobert'

Strong sell-through rate and multiple artist records offset soft demand for top lots

Sotheby’s will sell a rare Monet haystack five years after a similar work broke the artist’s record at auction

The four works, spanning nearly 40 years of the Abstract Expressionist’s career, will hit the auction block at Sotheby’s in May

The artist’s dazzling, Boschian composition “Les Distractions de Dagobert” is expected to fetch as much as $18m at Sotheby’s in New York next month

Destruction of final portrait by Graham Sutherland was captured in an episode of "The Crown". Now a study is being toured by Sotheby’s

A new musical about the glamorous Art Deco painter matches its subject’s maximalism

Punctured work is being offered at Sotheby’s New York after 20 years—and could fetch a record for the Italian post-war artist

Auction house’s bold changes that favour buyers could bolster profits—or they could backfire

The monumental canvas is expected to reset the record price at auction for any work from the series

Experts predict few operational changes after Sotheby’s wins fraud trial

The auction house made £82m before fees and set records for Etel Adnan and Takako Yamaguchi

Expectations are measured as sector adapts to new economic landscape

The hip hop legend worked with the record executive Jimmy Iovine and Sotheby’s to put on the event, which also featured performances by the producer Timbaland and the singer Andra Day

Scattered seven-figure highlights failed to make up for dozens of passed lots and multiple key withdrawals

The billionaire had sought at least $190m in damages from Sotheby's related to deals with Yves Bouvier. Instead, he will get nothing

The jury could return a verdict in the closely-watched lawsuit as soon as 30 January

Luxury goods and Millennials are helping buoy the bottom line, though fine art remains at the core of the business

The art market ‘trial of the century’ has transitioned from courtroom drama to bureaucratic headache

As the trial between the Russian billionaire and the auction house is thrashed out, it may be time to consider incorporating blockchain into the art scholarship process

The category’s extraordinary works sell well, but the middle and lower ends of the market are in need of new ideas

Plus, Singapore's art scene and a photograph by Zanele Muholi

Portrait of Isabel de Borbón was due to go on sale on 1 February

Evening sales at Sotheby's and Christie's drew in £19.4m and £21.3m, respectively