Experts worked for nearly a year at the Madrid museum to enhance the colours of the altarpiece.
This imposing eight-foot-tall canvas is dominated by a large photograph of former US president John F. Kennedy.
The painting was sold at auction by Christie's as a work by da Vinci for a staggering US$450 million.
Nahian painted his original artwork six years ago.
The museum will not charge the public to see the painting.
Some of Banksy's works in Paris were vandalised soon after they were put up, while others were protected by screens.
A writer who thought she had found a painting by Pablo Picasso stolen in an infamous art heist six years ago says she was the victim of a 'publicity stunt'.
The painting in Borneo, possibly depicting a native type of wild cattle, is among thousands of artworks discovered decades ago in the remote region.
Others digitally altered images of other protagonists like North Korean leader Kim Jong-un, Trump supporter and rapper Kanye West or Russian President Vladimir Putin onto some of the other presidents' heads.
The 7-foot-tall painting depicts a fleshy nude, perched on a stool and gazing in the mirror, scribbled with text.
Entitled "Juin-Octobre 1985", the abstract artwork was commissioned personally by the world-renowned Chinese-American architect I.M. Pei.
La Montagne Sainte-Victoire, painted by Paul Cézanne, will remain owned by the Bern Museum of Fine Art.
A page from newspaper Le Journal was used in Pablo Picasso's painting "Mother and Child by the Sea".
The last sale at a Paris auction of a Van Gogh painting was in the mid-1990s of his "Le Jardin a Auvers" (The Garden at Auvers) which went for $10 million.
Igor Podporin vandalised the painting for "historical reasons".
The National Gallery spent months removing a discoloured natural resin varnish from the museum's masterpiece that flattened the work visually.
Jan Six discovered “Portrait of a Young Gentleman” at an auction house.
"Le Marin", a painting by Pablo Picasso, had been expected to sell for around US$70 million.
"Los Rivales" sold for US$9.76 million at an auction held by Christie's.
Two paintings by Egon Schiele will be turned over to descendants of Fritz Grünbaum.
“Portrait of a Girl” is expected to be sold for around 60,000 euros.
All matters touching on the monarchy are highly sensitive in Thailand, a country where kings have been worshipped as near dieties and are protected by one of the world's harshest royal defamation laws.
A rare Picasso believed to be a self-portrait created when he was under threat of deportation to a Nazi concentration camp is expected to fetch US$70 million at auction, Christie's said Friday as the work went on view in Hong Kong.
The first Van Gogh painting to go under the hammer in France in more than two decades was unveiled Wednesday.
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