Cassel in Flanders is surrounded by the gentle and verdant landscapes that inspired Pieter Bruegel the Elder to create the populous and festive scenes for which he is still known and loved, 450 years after his death. Now the small town is celebrating his celebrations with a show at the new Musée de Flandre dedicated to his country fairs and weddings.

Having started their tour at the Barbican on Sunday, I Fagiolini descended on Bristol with their Leonardo da Vinci celebration on precisely the 500th anniversary of the great man’s death, a fact that earned them an extra round of applause from the proud but sometimes neglected Bristolians in St.George’s. 

Around the works canteen, a dozen huge wall-paintings depict, in bright cheerful colours spread across radically stylised forms, happy scenes of women and men at work and play beside a sunlit sea. They till, pick, dance, chat, dream, wander or water flowers. In their shapes and shades, all play their harmonious part in this beautiful, neutral world of elements and creatures and objects which (as Karl Ove Knausgaard puts it) “doesn’t care about us, which doesn’t care about anything, which merely exists”. And that indifference of the universe makes you want, not to scream, but to smile.

Tate Modern’s retrospective of Dorothea Tanning is a revelation. Here the American artist is known as a latter day Surrealist, but as the show demonstrates, this is only part of the story. Tanning’s career spanned an impressive 70 years – she died in 2012 aged 101 – but as so often happens, she was eclipsed by her famous husband, German Surrealist Max Ernst. 

“Slow looking” is the phrase du jour at Tate Modern, an enjoinder flatly contradicted by the extent of this exhibition, which in the history of the gallery’s supersized shows counts as a blow-out.

Reckless, unstoppable, one step ahead of everyone else, a hell of a lot of fun, utterly charming, street smart – descriptions of the artist Sidney Nolan (1917-1992) poured out from colleagues, rivals, curators, art historians and dealers, not to mention friends and family, in this persuasive film.

It took 24 days to sell off the 4,000 items which Horace Walpole had amassed during 50 years of avid collecting. He bought a modest property beside the Thames in Twickenham in 1749 and, by 1790, had extended and transformed it into a fairy tale summer palace where he could throw lavish parties and show off his collection to friends and visitors.

Pitched as “a tale of two artists”, the National Gallery’s big autumn show promises a history woven in shades of friendship and rivalry, marriage and family, privilege and hard graft. Andrea Mantegna and Giovanni Bellini were brothers-in-law, Mantegna’s marriage to Nicolosia Bellini in 1453 a strategic match that brought fresh blood to Venice’s greatest artistic dynasty.

In the autumn of 1892 Émile Bernard wrote home to his mother that, following the summer decampment to Pont-Aven of artists visiting from Paris and further afield, there remained "some artists here, two of them talented and copying each other.

The well-known portrait of New Zealand’s greatest writer, Katherine Mansfield, is exactly 100 years old on 17 June 2018 (main picture). It was painted by the American artist Anne Estelle Rice.