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

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

The Romanian painter’s prices have increased 160-fold over the past decade. But who, or what, is behind this steep rise?

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

Anny Shaw asks if auction houses and dealers should pay their dues to the artists from whom they profit

Object was returned to consigner not museum from where it was looted at the end of Second World War

Aguttes sold the fossil to an anonymous buyer, who may name the new species, despite protests from paleontologists

Hostile relations between Russia and the West following attempted poisoning of former MI6 spy may dampen bidding at London's Russian sales

Villa Grisebach says price is the highest paid for any work in a German auction

Still no evening auction, but blue-chip artists make way for fresh talent in new day sale format

Blaming an ingrained culture, auction houses vow to correct imbalance in women’s pay and representation in the highest ranks

Advisory group NM Rothschild has reportedly been brought in to oversee a possible sale of the British auction house

Highlights include works by Cady Noland, Kerry James Marshall and Lyonel Feininger

The heads of Christie's, Bonhams and Phillips speak on market shifts, challenges and why they believe their model will succeed

Our pick of highlights from upcoming auctions

Dealers will be compelled to verify identity of customers buying art for €10,000 or more

Our pick of highlights from upcoming auctions

Our pick of highlights from upcoming auctions

Announcement comes days after auction house reinstates buyer's premium in online sales

Our pick of highlights from upcoming auctions

Painting of artist’s lover and muse comes to auction for the first time at Christie’s New York in May

Discrepancy comes under scrutiny as more than 10,000 companies submit figures to the Government Equalities Office

Our pick of highlights from upcoming auctions

Our pick of this month’s most interesting auctions

A rare painting by Zao Wou-Ki and a watercolour from the collection of a former V&A director are also coming to auction

German artist questions authorship and market value in show of paintings by Chinese copyists based on famous works by Caravaggio, Hockney and others

Christie’s and Sotheby’s dominate in terms of value but smaller firms can compete in the field of Asian art, with the internet’s help

Our pick of highlights from upcoming auctions

Our pick of this month’s most interesting auction