New wing at Charing Cross site envisaged to be gallery’s largest transformation since its foundation 200 years ago

National Gallery exterior

The National Gallery’s main frontage on Trafalgar Square

The National Gallery is launching an architectural competition for what it describes as the most significant transformation in its 200-year history.

The museum has unveiled plans to build a £375m new wing on the last remaining part of its Charing Cross campus, a 1960s building called St Vincent House which sits directly behind the Sainsbury Wing.

The new building is envisaged to exhibit artworks outside of the gallery’s traditional collection, which has been informally limited to those dating to before 1900, through loans from the Tate.

In an announcement this morning, the museum said it wants the scheme to be of “both local and international significance, enriching the nation’s artistic presence on a global scale”.

It said the competition, launching tomorrow, is expected to attract both long-established and “exciting, younger” architectural firms with the new wing intended to bolster the relevance of “both the National Gallery and the UK within a highly competitive global cultural landscape”.

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The new wing will be built on the site of St Vincent House, a 1960s building acquired by the National Gallery in the late 1990s

The project’s huge price tag is a result of two of the largest ever publicly reported single cash donations to a museum or gallery anywhere in the world, with £150m coming from Crankstart, a charity founded by Michael Mortiz and his wife Harriet Heyman, and £150m from the Julia Rausing Trust.

Moritz is a Welsh former journalist and venture capitalist with an estimated net worth of £4.3bn who also funds the Booker Prize.

The Julia Rausing Trust is named in honour of Julia Rausing, a philanthropist who died last year. Charity trustee Hans Rausing said the donation was given in his late wife’s memory “so that others may discover the same beauty and inspiration in art that meant so much to her”.

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A further £75 million is coming from the National Gallery Trust, National Gallery chairman of trustees John Booth, and other donors who wish to remain anonymous. 

National Gallery director Gabriele Finaldi said: “We are hugely excited by these developments and are immensely grateful to our donors for their support - on an unprecedented scale - as the National Gallery steps into its third century.”

He said that with the expansion, named Project Domani, the gallery was “looking to the future” following the bicentenary which it celebrated last year with

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Selldorf’s refurbishment of the Sainsbury Wing, completed earlier this year

“We want to be the place where the UK public and visitors from across the globe can enjoy the finest painting collection in the world from medieval times to our own, in a superb architectural setting,” he added.

The announcement follows a recent meeting between the trustees of the National Gallery and Tate which where a “historic partnership” is said to have been agreed in principle.

Tate director Maria Balshaw confirmed the gallery group will loan artworks to the National Gallery and provide curatorial and conservational expertise for the new displays.

The site’s existing building was built in the 1960s and currently houses office space and a hotel. It was acquired by the National Gallery in the late 1990s for the purpose of expanding the museum’s gallery space.

The National Gallery said the project will also aim to revitalise the area between Leicester Square and Trafalgar Square to create a “vibrant, fresh experience” for visitors, with the new wing intended to take advantage of advances in building techniques and sustainability in recent decades.