Who would not want their picture hanging in their nation's portrait gallery?

The answer appears to be Australian billionaire mining magnate Gina Rinehart whose portrait has been returned after a disagreement over how it should be displayed.

Rinehart, said to be Australia's richest person with a personal fortune of around $26 billion, gave the painting by Alix Korte to the National Portrait Gallery in Canberra seven years ago.

But the Sydney Morning Herald reports it has been "quietly returned" after the two parties "failed to reach an agreement over the legal terms of the gift".

Speaking in 2024, gallery director Bree Pickering said they had been given a "specific set of instructions regarding its display and added most "people tend to be happy to have their painting in the gallery".

A spokesperson for the gallery was more conciliatory this week, saying it "recognizes the generous offer of the gift by Mrs Rinehart" and keeping open the possibility another portrait of her may still find its way into the collection.

The size of the budget cut facing New York's Department of Cultural Affairs over the next two years that will have to be dealt with by incoming commissioner Diya Vij whose appointment was announced on Saturday.

A long-lost work by Rembrandt is going on show from Wednesday at Amsterdam's Rijksmuseum after researchers spent two years proving it is genuine.

The 1633 painting, Vision of Zacharias in the Temple, was excluded from Rembrandt’s oeuvre in 1960 then disappeared from public view a year later when it was sold until the current owner contacted the museum allowing it to be examined for the first time in 65 years.

Researchers compared it with other Rembrandts from the same period and found such similarities in style, technique and even the paint used they were able to declare it genuine.

Rijksmuseum director Taco Dibbits said: "It’s wonderful that people can now learn more about the young Rembrandt – he created this very poignant work shortly after moving from Leiden to Amsterdam. It is a beautiful example of the unique way Rembrandt depicts stories."

Overtourism and climate change have combined to threaten the future of Michelangelo's Last Judgment in the Sistine Chapel - in the shape of salty white patches created by the sweat of thousands of tourists.

Scaffolding went up in the historic site in Rome last month as restorers got to work cleaning the fresco.

It will take three months to complete and the Vatican’s chief painting restorer Paolo Violini told the Sunday Times it involved removing "whitish coloring" left on the work in the form of a "deposit left by years of evaporated sweat from thousands of visitors".

The evaporating sweat, levels of which are increasing along with temperatures, combines with calcium carbonate in the wall of The Last Judgment to produce white salt which builds up on its surface.

The chapel will stay open while the restoration is done with the restorers at work on the original - hidden behind a high-definition reproduction.

1 - Philadelphia Museum of Art CEO Daniel Weiss said launching a new pay-what-you-wish entry scheme on Friday evenings is an attempt to make people "appreciate the museum for what it has been, not for the drama and conflict". The museum, which will run the scheme for five months starting from April 10, has been in the headlines for the acrimonious dismissal of Weiss's predecessor Sasha Suda and a failed rebrand that briefly changed its name to Philadelphia Art Museum before reverting to the original.

2 - Lithuanian artist Lina Lapelyte is taking over the Turbine Hall at London's Tate Modern later this year for a "large-scale participatory performance" as part of UNIQLO Tate Play. Visitors will be asked to move through a maze in time with an accompanying soundtrack to create a piece of collective choreography. The installation runs from July 25 to August 31.

3 - Greek Culture Minister Lina Mendoni has confirmed a stash of World War II black and white photographs discovered after being offered for sale on eBay "are now the property of the Greek state”. The dozen grainy images bought by the government are believed to show the final moments of around 200 Greek communists executed by the Nazis in retaliation for the killing of a German general by the resistance.

4 - Nicholas Bell has been appointed as director of the Royal Ontario Museum in Toronto, Canada. Currently CEO at Calgary’s Glenbow Museum, he previously worked at the Smithsonian American Art Museum in Washington D.C.