That upgrade to the Louvre's security systems cannot come soon enough as the Paris institution was embarrassed again - this time by a pair of pranksters rather than a gang of thieves.

Neal Reemerie and Senne Haverbeke managed to evade staff at the museum during a visit four days ago and hung a self-portrait in the Salle des États gallery which is home to the Mona Lisa.

To add salt to the Louvre's wound, they filmed the whole thing and posted it online showing how they made the frame from Lego to bypass security controls.

The pair made headlines in May when they smuggled themselves into Munich's Allianz Arena, hiding in a bathroom for 27 hours, to watch the Champions League soccer final for free.

Earlier this month, the Louvre announced a $92 million overhaul of its security systems in response to the $102 million jewel theft that made headlines around the world.

The number of visitors to Southern California's outdoor art exhibition, Desert X, over the last decade. The show, which recently announced its 2027 edition will triple its run to stretch over six months, is led by creative director Neville Wakefield and newly hired curator Kaitlin Garcia-Maestas.

Public prosecutors in Vienna have ordered the seizure of a $16 million work by Gustav Klimt amid confusion over its export status.

The painting of a Ghanaian prince was put up for sale at the Tefaf art fair in Maastricht in the Netherlands earlier this year after being transported from Hungary to Austria.

But the Hungarian authorities, who requested the work be seized, say its export permit did not attribute the work to Klimt.

The Viennese gallery which offered it for sale, Wienerroither & Kohlbacher, told Austrian media its owner was "rightfully" given an export permit and at the time the painting was taken across the border it was unclear whether it was an authentic Klimt.

A Washington D.C. museum's decision to sell works by Georgia O'Keefe, Arthur Dove and Georges Seurat has been branded "a shame" by the granddaughter of its founders.

The works, being sold by the Phillips Collection to pay for future acquisitions, are among lots being offered by Sotheby's at its Modern Evening Auction in New York on Thursday.

O'Keefe's Large Dark Red Leaves on White is estimated to fetch $8 million with the Seurat drawing valued at $5 million and Dove's work at $1.8 million.

Liza Phillips, a granddaughter of Duncan and Marjorie Phillips who opened the museum in 1921, told the Washington Post the works "belong to the public". She added: "They are now probably going into private hands. It’s just a shame.”

The museum, led by director Jonathan P. Binstock, said most of the money raised by the sales would be used to commission new works by living artists.

1 - Max Hollein, the director of New York's Metropolitan Museum of Art, was in South Korea last week to oversee the return of a stolen painting from its collection. The 1798 work, The Tenth King of Hell, was given back to a Buddhist temple in Gangwon Province after being stolen during the Korean War and came to the museum in 2007.

2 - Andreas Angelidakis has been chosen to represent Greece at next year's Venice Biennale. The Athens-based artist will show a work described as "drawing from the phenomenon of escape rooms" and the writings of Plato.

3 - An Isabella Ducrot show put on by Sadie Coles gallery in a historic temple was among the exhibitions at this year's Art Collaboration Kyoto fair in Japan. The fair, now in its fifth year, brought 36 international galleries together with the same number of Japanese galleries for the event which ended yesterday. Read more about the Kyoto art scene in our new city profiles here.