Timewarps, death masks and a Picasso torched in an oven – the week in art

Suck on free sweets as you gaze at Warhol's balloons. PLUS Picasso up in smoke, new blood for the Stirling prize and a museum full of fakes – all in your art roundup

Exhibition of the week: Indifferent Matter

This timewarping, mind-exercising exhibition juxtaposes fragments of ancient Roman sculpture with Andy Warhol's Silver Balloons, and prehistoric jade discs from China with sweeties by Felix Gonzalez-Torres. You can take away the sweets but not, presumably, the priceless jade artefacts. The show contrasts the made with the readymade, the formed with the lumpen. It includes Hans Haacke's 1967 work Grass Cube, on top of which grass grows, and Robert Smithson's self-explanatory 1969 object Asphalt Lump – plus a newly discovered mineral and a collection of strangely shaped stones once thought to be primitive works of art. Intriguing.
Henry Moore Institute, Leeds LS1 from 25 July until 20 October

Other exhibitions this week

Witches and Wicked Bodies
This exhibition explores witchcraft and magic in art from Durer to Paula Rego.
Modern Two, Edinburgh EH4 from 27 July until 3 November

Visions of Mughal India
Howard Hodgkin is a romantic, colour-addicted painter and his collection of Mughal art reflects a sensual appreciation of its power.
National Museum Cardiff, Cardiff CH10 from 27 July until 3 November

Mostly West
The much-missed artist Franz West is remembered through his collaborations with others including Douglas Gordon and Mike Kelley.
Inverleith House, Edinburgh EH3 until 22 September

Louise Thomas
This young painter creates exotic scenes, urban landscapes and other evocative, half-recognised images.
Bischoff/Weiss, London W1J until 2 August

Masterpiece of the week

Black-figured amphora signed by Exekias, ancient Athens, 540-530BC
Ancient Greek painting survives mostly on clay vessels like this one. Wall paintings and panel pictures from that world are mostly lost, but in decorating vases and wine jars and other useful objects, artists like Exekias created images of potent drama and beautiful restraint.
British Museum, London WC1B

Image of the weekWhat we learned this week

Why a stolen Picasso was burned in a stove in Romania

The Stirling prize shortlist for best building of the year has five newbie nominees on it – and lots of women

There are lots of broken dreams in America, as Walker Evans's beautiful 1930s depression-era photographs go on show at MoMA

And as the city of Detroit files for bankruptcy, we remember these stunning photographs of a city in ruins

Why academics are trying to stop a photo of Damien Hirst grinning with a real severed head from being exhibited

What a truly cycle-friendly city might look like

That there's a museum in China filled with around 40,000 fake artefacts

What Richard Rogers really thinks about his career

And finally ...

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ArtArchitecturePhotographyJonathan Jones
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