Artist known for wrapping the Reichstag creates mountain of oil barrels in the Serpentine

The urgent need to reduce plastic waste has revived the case for public drinking water

Mark Wallinger’s ‘Writ in Water’ at Runnymede pays tribute to signing of 1215 document

This year’s temporary structure in London’s Hyde Park is clever, intriguing — and somewhat gloomy

Scaled-back plans for the city’s new cultural quarter play it a little too safe

What should be done with tainted buildings and monuments?

The £23m Queen’s Diamond Jubilee Galleries are the first major addition in 250 years — and a real pleasure to visit

‘Municipal Dreams’ explores what happened when decent housing came to be seen as an unaffordable luxury

The Biennale is a breeze to walk through — quiet, uncluttered, visually coherent — but what does it tell us?

An exhibition that bristles with unexpected gems

David Chipperfield’s expansion scheme opens up a venerable institution to create new public space

In an age of global chain stores, how can we reimagine the old town square?

The role of water in the fates of both Britain and Venice is cleverly reflected at the Biennale

The architectural movement has been vilified since the 1990s but a new appreciation of it is emerging

The esteemed British architect on his remaking of the Royal Academy and where today’s cities are going wrong