The best American art shows of 2015

A thrilling show about the alignment between jazz, art and politics rocked Chicago, while the Met staged a groundbreaking show of Kongo civilization and Charles Ray’s sculpture proved too hot for the Whitney to handle

More on the best culture of 2015

The £30m bookshelf: Pierre Bergé and the greatest stories ever sold

With Impressionists on their walls and priceless books on their shelves, Pierre Bergé and his former partner Yves Saint Laurent were the ultimate collectors. But now the art and YSL have gone, Bergé says it’s time ‘to attend the funeral’ of his library

Museum of Tomorrow: a captivating invitation to imagine a sustainable world

Rio de Janeiro’s new museum, focusing on ideas rather than objects, ecology more than technology, is a little trippy, a little hippy, very worthy but rarely dull

Laura Cumming: the best art of 2015

It was a wonderful year, as Goya’s extraordinary portraits got together, Ai Weiwei broke free and Eric Ravilious took us to the skies

Observer critics’ reviews of the year in full

Golden Globes nominations 2016: will it be a Blanchett-DiCaprio one-two?

Carol and The Revenant look like propelling their leads to awards-season glory, but Steven Spielberg has good reason to feel snubbed over Bridge of Spies

From baroque to bling: how France became king of high style

In early modern Europe, as political power shifted, one country became a leader in luxury. Now the V&A’s new galleries reveal how, through conflict and colonialism, France gained its artistic supremacy