From Kardashian to couture: how Balmain got its 21st-century buzz

Olivier Rousteing, the fashion house’s 28-year-old creative director, explains why he’s obsessed with social media and star power

Philharmonie de Paris: Jean Nouvel’s €390m spaceship crash-lands in France

Paris’s gargantuan new concert hall is two years late, cost three times what it should, and its architect even snubbed its opening … Oliver Wainwright tackles a tyrannical new mothership

Gucci’s menswear collection defies expectations after Giannini exit

Early departure of design director sees androgyny take centre stage as long-haired, lace-clad male models rule the runway

It’s great that Céline is celebrating Joan Didion – but to sell accessories?

The line between celebration and exploitation is a fine one – and I’m not really sure my literary hero should be fronting a fashion advertisement

Organic farming not always best for environment, says government adviser

Lord Krebs claims that organic farming needs more land than conventional methods to produce the same yield

Solar power drives renewable energy investment boom in 2014

Global clean energy investment leapt 16% in 2014 led by solar power surge in US and China – but Europe lags behind