Are the most expensive paintings ever worth their prices? A definitive ranking

On Monday, Modigliani’s Reclining Nude joined an elite band of artworks that have commanded over $150m at auction or private sale – but are they worth it?

Sex sells: why Modigliani’s 98-year-old hymn to lust is worth $170m

Painted through an absinthe haze as the first world war raged, Amedeo Modigliani’s Nu couché mixes modernist thrills with age-old hedonism. No wonder it still seduces

The beauty of bikes – redesigning two wheels

The bicycle’s technical evolution and symbolic power are soon to be celebrated in Cycle Revolution at London’s Design Museum

Dutch museum achieves the impossible with new Hieronymus Bosch show

To mark the artist’s 500th anniversary, the director of small Dutch museum secures 20 of 25 surviving panels by ‘the devil’s painter’

‘It’s an insult’: Chinese property developers race to the top of London’s skyline

Giant luxury towers (with their own karaoke rooms) to spring up around the city as eastern investors look to Britain. But residents fear deals will force them out

Swiss couple Iwan and Manuela Wirth top art power list

Wirths praised for changing model of how art is bought and sold, while Ai Weiwei ranks second and Nicholas Serota falls to fifth