Buy a masterpiece for 67p! New stamps by Tracey Emin, Yinka Shonibare, Grayson Perry and more

Tracey Emin drew her dying mother, Grayson Perry honoured Warhol, and Yinka Shonibare sneaked a bit of Africa into some English brollies … artists reveal all about their dazzling new stamps

From Picasso at his mightiest to gods of American cool: the hottest art shows of 2018

Picasso reveals his most erotic year, Andreas Gursky predicts the post-truth era, O’Keeffe and Hopper hit Oxford – and the only way is Sussex for William Blake in our exhibitions preview

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

Rowan Moore’s top 10 exhibitions of 2014

Parking lots in Los Angeles, arty wind tunnels, Dada collages and 1960s visions of future living – Rowan Moore picks his favourite shows of the year

Ai Weiwei, Modern Toss, The Turner Prize: this week’s new exhibitions

From Ai Weiwei’s show at Blenheim Palace to The Turner Prize in London, Skye Sherwin and Robert Clark find out what’s happening in art around the country

Sensing Spaces: Architecture Reimagined – review

Royal Academy, London
The Royal Academy’s ambitious look beyond the purely visual aspects of architecture is full of surprises

Gallery: see some of the installations from Sensing Spaces