British-based collectors disregard Brexit and buy a quarter of works in contemporary art auction

Proceeds from sale at Christie’s in London will benefit work on wildlife

Shanghai’s Long Museum buys Sensation work as Asian and US collectors search for a bargain post-Brexit

Strong bidding from US and Asia helps shore up 20th-century and contemporary sale

As the auction house celebrates a milestone anniversary, its global president reflects on what's in store for the future

Three highlights going under the hammer in the Defining British Art sale in London on 30 June

Political uncertainty and last-minute withdrawals may have contributed to below-estimate results

Ahead of Brexit vote, auction house’s Impressionist and Modern Art evening sale achieves solid results

Auction house has hired Hannah O’Leary, formerly of Bonhams, to head up new department

New technology allows collectors to take part in sales in real time

The painting of flowers, probably done in France during a mysterious period in the artist’s life, has been authenticated by the Paris-based Wildenstein Institute

Our pick of highlights coming to auction this week

Work was bought at C.R.W. Nevinson 1916 exhibition, attended by Winston Churchill and George Bernard Shaw

Our pick of this week’s international auctions

The late critic was an expert in the auction house’s Old Masters department

Auction houses in Berlin, Cologne and Munich offer a restituted Menzel, Brücke artists and a Richter

Auction results were stellar 12 months ago, but sense and caution meant the houses had to work hard for more sober results this time round

Chair of Smithsonian’s National Museum of the American Indian calls on owners of disputed objects to return them

A nearly complete stegosaurus goes under the hammer at Auctionata’s fossils and minerals sale

Six-foot study depicting River Stour is estimated to sell for between £12m and £16m

Launch show will incorporate art highlights from November New York sales

Highlights going under the hammer in this week’s international auctions

Increase puts auction house’s fees in line with Sotheby’s; Christie’s a relative bargain

Highlights going under the hammer in London at Sotheby’s, Christie’s and Phillips

Femme Assise has been in private hands for the past 43 years

Auction specialist left her position as head of contemporary art at Sotheby’s last month

Works by Kahlo, Monet and Hepworth were high points of an otherwise average night

The internet auction houses have united to target the middle market and Millennial collectors