Even a 39ft-high ceramic wedding cake goes off eventually as Joana Vasconcelos has just discovered.

The sculptor's work was hailed by critic Jonathan Jones as maybe the "first wholeheartedly joyful artistic masterpiece of the 21st century" when it was unveiled three years ago in Waddesdon Manor in England.

But now it could be dismantled as early as next year after local officials at Buckinghamshire Council said it had to be removed after health and safety concerns were raised over faults to the ceramic tiles.

A spokesperson for the manor told the BBC that "due to a variety of circumstances, it was regretfully decided that it should be dismantled."

The manor, which was given to the nation by the Rothschild family whose members including Jacob introduced contemporary art to the house, is home to an art collection including works by Ingo Maurer and Joshua Reynolds and recently announced plans for a sculpture trail.

It is good to see Berlin's Neue Nationalgalerie can forgive even if its new show is proof it definitely does not forget.

Ulay, Ulay & Abramovic marks 50 years since performance artist Ulay walked out of the museum with Carl Spitzweg’s The Poor Poet under his arm as part of a performance intended to highlight racism in 1970s Germany.

Ulay stole the painting, described as having been Adolf Hitler's favorite, hung it in the home of a Turkish immigrant family and then gave himself up along with the undamaged painting. He ended up in court but his crime was punished with a fine paid by his friends.

The show examines his solo work and 12-year-long collaboration with Marina Abramovic and runs from November 28 to May 2.

But at its heart is the film he made about his 1976 theft which the museum describes as questioning its role as "a place of cultural authority" and challenging ideas of "cultural representation, belonging, and exclusion in 1970s West Berlin".

The museum has brought another version of The Poor Poet, on loan from the Grohmann Museum in Milwaukee, for the show curated by its director Klaus Biesenbach.

Eastbourne's Towner Gallery has hailed Ryan Gander's new show as his "first UK solo exhibition in nearly 20 years" but that is not quite right.

The show on the south coast of England is actually a collaboration with his seven-year-old son Baxter.

It includes a series of works where Baxter, who is autistic and non-verbal, chose the images and Gander painted them.

He told The Guardian newspaper his son was "hypersensitive in ways that we would never be" and the works they collaborated on were intended to highlight "the way humans try to rationalise everything that’s different".

Maybe: Ryan Gander opens on Saturday and runs to April 11.

The Art Gallery of Ontario has set an opening date for its multi-million-dollar extension to its existing Frank Gehry building.

Its 40,000 sq. ft Dani Reiss Modern and Contemporary Gallery will open on September 25 next year - five years after the project was launched with a $25 million donation from the CEO of the Canada Goose clothing firm.

It will give the museum 30% more space to show its collection which includes works by Diane Arbus, Theaster Gates, Felix Gonzalez-Torres and Peter Hujar as well as the largest public collection of Henry Moore outside the UK.

Museum director Stephan Jost said the five-floor building was "more than an expansion project", describing it as "Toronto and Canada announcing its global position".

1 - Danny Moynihan's first solo show in continental Europe opens today at the Nino Mier gallery in Brussels. The show, which runs to December 19, includes work from 2002 as well as more recent pieces inspired by the landscape of Morocco and the South of France.

2 - Next year's Liverpool Biennial, curated by Aimee Harrison and Lucia Sanroman, will be inspired by themes of childhood. The event, called The Age of Magical Thinking, runs from June 5 to September 19 and will feature work by the likes of Francis Alys, Tania Candiani; and Laakkuluk Williamson.

3 - Christopher C. Giglio has been elected president of the board of trustees of the American Folk Art Museum. He succeeds Elizabeth V. Warren, a former curator at the New York museum, who stays on the board as president emerita.