Launch of Beijing venue combining works by both artists is postponed—and some loans in doubt

Exhibition at Hauser & Wirth in Gstaad, Switzerland, shows images captured by the war photographer David Douglas Duncan

An exhibition in Athens about the life of Christian Zervos, whose 33-volume catalogue of the artist is indispensable to the Picasso market

From Ruth Asawa's delicate structures to a revelatory show of Picasso's paper works

Our pick of highlights from this week's auctions

Jaime Botin, of the Santander dynasty, did not have a permit to export the painting

Most of the works, created with felt tip pen on newsprint, have been lost, but two have been specially restored for London show

Conservation team assesses the defaced work; man is charged with criminal damage

We look back at the biggest art sales of the year, which reveal a concentration on New York over London and a continued dominance of 20th century male artists

Portrait of Dora Maar eclipses other auction offerings at Heffel

Pierre Le Guennec and his wife Danièle hoarded 271 works for 40 years

Paris-based institutions Musée National Picasso and the Fondation Giacometti will open space in 798 district next June

Under new leadership, the longest-running fair dedicated to prints hopes to educate buyers on the pros and cons of the medium

An exhibition focusing on the artist’s Blue Period came together after high-tech examinations of the work revealed hidden surprises

We speak to the Ghanaian artist as he unveils a major new commission at the Whitworth as part of the Manchester International Festival. Plus, we find out about the Picasso blockbuster at UCCA in Beijing. Produced in association with Bonhams, auctioneers since 1793.

From the towering ambitions of a young Picasso to Rebecca Horn's Body Fantasies

Swiss museum extended the show to accommodate visitors to Europe for Art Basel and the Venice Biennale

Exhibition traces the evolution of the splintered style that changed Modern art forever

Major survey of the Surrealist photographer at Centre Pompidou will travel to Tate Modern and the Getty Center

A show of the Spanish master’s works at Gagosian in New York will be followed by Dora Maar and Olga Khokhlova surveys in Europe

The €25m work was stolen 20 years ago from a yacht on the French Riviera

Dealer tells us about the challenges of running a space in Shanghai’s West Bund and how the gallery keeps up with the growing competition

We meet the photographer David Bailey at his London studio to discuss his new book and we talk with Gijs van Hensbergen about John Richardson, who died aged 95 last week. Produced in association with Bonhams, auctioneers since 1793.

We recently spoke to the art historian about his new book focusing on his extraordinary life, his homes and his eclectic personal collection

The show promises a continuum in Picasso’s work, a gentle slide, rather than rigidly compartmentalised episodes

Critics say the proposed law, which stalled following the US mid-term elections, would place an unnecessary burden on dealers