One of the largest collections of Henri Matisse's celebrated cut-out artwork will go on display at the Tate Modern later this week.
The walls of Tate Modern are to be adorned with comic strips and advertising images as the gallery exhibits the works of Roy Lichtenstein.
A man has claimed responsibility for defacing a valuable Mark Rothko at the Tate Modern art gallery, but denied he is a vandal.
A museum within a museum has opened in Tate Modern as part of the gallery's expansion into African art.
Benin artist Meschac Gaba's work, Museum of Contemporary Art, takes up 12 rooms in the south London gallery and includes a games room complete with a giant chess set and regular visits from a tarot reader as well as its own shop, restaurant and reading room.
– Meschac Gaba, Artist
"I needed a space for my work, because this did not exist".
The exhibition runs at the gallery from Wednesday until September 22.
London band Mumford & Sons are among musicians who have recorded new versions of famous protest songs to highlight global poverty.
A film showing video for their track and others by the likes of Will I Am and Ed Sheeran will be projected on to the side of the Tate Modern tonight, tomorrow and Thursday evening.
Gregor McKinley, prosecuting, said:
Sotheby's has given Tate Modern a verbal estimate of pre-damage value of approximately between £5 million to just over £9 million.
The work required to restore this picture will be complex and lengthy.
Complications to this work include the unique painting technique used by the artist and the fact the ink used by Mr Umaniec has permeated the paint layers and the canvas itself.
Mr McKinley said work to restore the painting will take about 20 months and cost "something around £200,000."
Gareth Morgan, defending, said it would take a "significant amount of effort, expert effort at that" to restore the "important, valuable piece of art".
Paintings by Russian-born artist Rothko often fetch tens of millions of pounds.
Judge Roger Chapple, at Inner London Crown Court, told Umaniec: "Your actions on the 7th of October of this year were entirely deliberate, planned and intentional."
He said it was "abundantly clear" that Umaniec was "plainly an intelligent man" and told the court he had described Rothko as a "great painter" in a letter he had written to him.
The judge also said the incident had led to galleries reviewing security arrangements at a cost to themselves and the taxpayer.
"The effects of such security reviews is to distance the public from the works of art they come to enjoy," he said.
A man has been arrested over the defacing of a Mark Rothko painting at the Tate Modern.
A 26-year-old man was arrested by Sussex Police at an address in Worthing.
He's been arrested on suspicion of criminal damage and is now in custody at a Sussex police station.
Art restorer Amy Griffin, from the Simon Gillespie Conservation Studio, says that it should be possible to remove the graffiti without damaging the original painting.
The Assistant Editor of the Art Review magazine, Oliver Basciano, says there's a long history of artworks being defaced for political and so-called "artistic" reasons.
A man has admitted defacing a Mark Rothko canvas at the Tate Modern worth tens of millions of pounds. Eyewitnesses said the man wrote some words with a black pen on one corner of the 1958 work "Black on Maroon".
Paul Brand has the latest.