Its companion piece sold for a record £26.7m in 2011

The Bright Stone of Honour and the Tomb of Marceau will go on show in Cologne this week

Our pick of highlights from this week's auctions

“The market is back,” says Christie’s head—but pressure to secure top property is “huge”

Sales of works throughout the year will benefit the late philanthropist and land conservationist’s Wethersfield Foundation

Sotheby's advances, Christie's consolidates

Move is part of auction house’s shift to online sales, which more than doubled last year

Our pick of highlights from this week's auctions and fairs

June auction will feature works of art that can be reproduced at actual size in the catalogue

Records for Wolfgang Tillmans and Georg Baselitz help auction house achieve 70% more than last year

Records for seven artists contribute to an increase in value of 65% on last year

Quality works by household names bring a successful round of evening auctions to a close this week

Market reassured after high sell-through rates at the auction house's two sales

Auction house says it has resolved questions over the provenance of Girl in the Foliage

Tad Smith gives credit to the Eastern market during fourth quarter earnings call, as well as growing online sales and aggressive recruitment

The auction house is also selling works by Picasso, Ernst and Lichtenstein to benefit Cleveland Clinic

Auction house removes image from online version after German journalist spots error

The vibrantly painted landscape is expected to make more than $45m

Two-story space in Beverly Hills will host private sales, public exhibitions, and events

Show at S|2 gallery in London is part of growing trend to revaluate and promote female artists

Competition is stiff for confirmed works, but buyers also gave a nod to quality

Work was precursor to painting that fuelled rumours of Surrealist’s sexual attraction to Ana María

Choice works by less familiar names go under the hammer this week

Rare outing on the market for a landscape by the German artist best known for his abstract paintings

Paddle8 announces it has an investor to lead buy back from parent company

Our pick of highlights from this week's fairs and auctions

A 2014 sale of photographs from the non-profit's collection set an auction record

Weak pound and successful museum shows means increased audience for Post-war American artists