From Byzantine bannings to the Jeff Koons attack: the lamest art vandalism ever

The recent lacklustre spray-paint job on a Jeff Koons is nothing new in art … rubbish vandals have always been with us

• Jeff Koons retrospective targeted by vandal

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

What is art for? Alain de Botton’s animated guide – video

In this exclusive video for the Guardian, philosopher Alain de Botton gives his top five reasons why art is such a vital force for humanity. Are we wrong to like pretty pictures? Why is some art painful to look at? Can art heal your feelings of urban alienation? Relax, watch and find out

Subversive design, radical Germans, and cultured holidays – the week in art

The V&A celebrates design as a form of protest, Isa Genzken brings her radical vision to Edinburgh, and we showcase the best exhibitions to catch on your summer travels – all in your weekly art newsletter

Secret oasis: the artist who’s hidden a swimming pool in the desert

Alfredo Barsuglia has put a swimming pool deep in the Mojave desert, which you need a treasure map to find. It’s a perfect parody of our world of instant gratification