After Ernst Klimt’s sudden death at 29, Gustav completed "Hans Wurst Delivering an Impromptu Performance in Rothenburg" and signed it in his brother’s name

Unpacking the mystery around the Austrian artist’s painting, which sold for €30 million in Vienna, plus a look at a retrospective of Horn’s pioneering practice and a newly conserved Cézanne

The price paid by a buyer from Hong Kong was at the lower end of the estimate range, but still an auction record for Austria

Plus, a mid-career painting by African American artist Hughie Lee-Smith

The auction house Im Kinsky estimates the price of the 1917 painting at between €30m and €50m

The night's star lot made up nearly half of the £190.3m total for Sotheby's Modern and contemporary evening auction

Lady with a Fan (1917) was last sold for $11.6m in 1994 and will be offered at Sotheby's in London on 27 June

An exhibition at the Alte Nationalgalerie in Berlin explores the "secessions" in three key European cities

The painting is estimated to sell for around $45m next month at Sotheby's

Curators at Leopold Museum say that Letzte Generation's protest against fossil fuel projects left no damage to either the picture or the original frame

Klimt discovered Van Gogh in 1903—and took inspiration from the Dutch painter for his early landscapes

Andrey Kezzyn recounts how hearing a tale of two lovers separated by the war spurred him to remake the famous art historical image

The mass restitution is expected to be endorsed by the French Senate on 15 February

Apple Tree II, once confused for Roses Under the Trees, was returned to the wrong family 20 years ago, leaving the heirs of its original owner facing huge obstacles to get it back

Rosiers sous les arbres will be restituted after a legal process releases it from the national collections

Discovered by the gardener at the Ricci Oddi gallery last year, Portrait of a Lady will be the star of a series of exhibitions on the much-loved artist

A woman connected to the museum where the painting was found is under investigation by the Italian police

Gardener discovered the painting behind a metal plate on an exterior wall at Italy's Ricci Oddi gallery

Designer who unearthed the plaster relief attributes it to the Austrian artist

The adaptations and expansions of the Austrian painter in the nations of the former Austro-Hungarian Empire

From the erotic drawings of Klimt and Schiele at the Royal Academy to a last chance to see two hard-hitting shows by Mika Rottenberg and Hannah Perry

We talk to Alyce Mahon, the curator of the Dorothea Tanning exhibition in Madrid, and adviser for the Leonor Fini show in New York about the art and life of the two surrealist artists. Plus, as a spate of shows open in Europe and the US, we discuss how Klimt and Schiele compare. Produced in association with Bonhams, auctioneers since 1793.

New book exploring work's provenance is a must-read for those interested in the contentious field of art restitution

Exhibition looks at Austrian obsession with flower painting since the 18th century

New show explores how the Austrian artists tackled “issues that we’re grappling with today”

Show tells the stories behind seven great works that have disappeared and the creation of new digital facsimiles

A look at the life and art of the two Austrian greats as shows open marking their 100th anniversary. And the New Museum Triennial is reviewed.

The artists are the subject of exhibitions across the Austrian capital—and beyond