The number of diamonds on the Faberge Winter Egg being auctioned at Christie's in London on Tuesday.

Jan van Eyck's Arnolfini Portrait is already the National Gallery's most popular painting online and the London institution is hoping it will have real-life appeal at the heart of a major new show.

It is one of more than 20 paintings by the 15th-century Dutch painter going on show next year in the first ever exhibition of his portraits.

The 1434 painting, which is part of the gallery's collection and is the subject of the most visited painting page on its website, will be shown alongside another portrait of the same sitter on loan from Berlin's Gemaldegalerie.

The gallery said in the last three years it had 396,046 page views - almost 150,000 more than the next most popular which was its Van Gogh's Sunflowers.

Also in the show is van Eyck's portrait of his wife, Margaret, which is one of the earliest known secular portraits of a woman who was not a member of the aristocracy.

Van Eyck: The Portraits opens on November 21 next year and will run to April 11, 2027.

South Korean artist Lee Ufan has won the 32nd Wolfgang Hahn Prize which is presented annually by the Museum Ludwig in Cologne.

The prize includes funds of up to $115,000 to buy work by the winner for the museum's collection.

Guest juror Mami Kataoka, Director of the Mori Art Museum in Tokyo, said Ufan had spent 60 years pursuing "the essential meaning of existence across all relationships that transcend East and West, neither following Western modernism nor being bound by Eastern spiritual traditions.”

An award ceremony is planned for November 6 next year followed by an exhibition of his work at the museum.

Previous winners include Cindy Sherman and Francis Alys.

The Courtauld in London has announced plans to open a new "world-class" campus in 2029 with a new lecture theatre and library.

The plans will connect it to its gallery, which was itself revamped only a few years ago, and bring students and staff and visitors to its art collection together under one roof at its base in Somerset House.

Its director Mark Hallett said the plan would create "a beautiful and stimulating environment in which to learn about the visual arts."

The plans were unveiled on the same a day a report on the teaching of art history in UK schools found "a significant disparity" in where it is taught with it being largely concentrated in private schools in London and the southeast of the country.

1 - The early years of Arte Povere pioneer Piero Manzoni are the focus of a new show at Hauser & Wirth in Basel. The show, which opens today and runs to February 14, includes work made in 1956 and 1957 only six years before his early death aged 29.

2 - Michael Werner Gallery in London's Mayfair is showing new paintings by Barbara Wesołowska in a show opening tonight. Empty Night is open to January 31 and shows the influence of pioneering psychoanalyst Sigmund Freud with many of the paintings given names drawn from his writing.

3 - The new GRIMM gallery in London's St James's opens its first show today with a solo exhibition of new work by Matthias Weischer. Off Target is Weischer’s first solo show in London in more than 20 years and comes 21 years after he was chosen as a protege of David Hockney in a mentoring scheme funded by watchmaker Rolex.

1 - Antwerp's Middelheim sculpture museum is holding a solo exhibition by artist Monster Chetwynd next year. The open-air museum, which opened in 1950, is home to work by artists from Auguste Rodin and Henry Moore to Superflex and Joan Jonas.

2 - Tate Britain's Turner and Constable show opens in London today. The exhibition celebrating the 250th anniversary of their births includes more than 170 works such as Turner’s 1835 The Burning of the Houses of Lords and Commons which has not been on show in the UK for more than 100 years.

3 - Munich's Lohaus Sominsky gallery is opening its first space in New York. The building, in White Street in Tribeca, will open on December 11 with a show by Berlin-based Charlie Stein.

4 - Glyn Philpot's Portrait of a Man with Hibiscus Flower (Félix) (1932) sold for $499,400 more than three times the low estimate at Sotheby's in London on Tuesday. The sale beat the British artist’s previous auction record by $26,600, a 5% rise.