Tunnels, treehouses and tensegrity towers: landmarks in protest architecture, from UCLA to Hong Kong

How did UK activists outfox 700 police? Why was Hong Kong traffic stopped by ‘mini Stonehenges’? And could an octagonal treehouse and a crow’s nest really have saved a German forest? Our writer enjoys a 200-year history of resistance architectureIn his 1868 street-fighting manual, Instructions for an Armed Uprising, the French revolutionary Auguste Blanqui sets out meticulous instructions for how to build a good barricade. Such defences, he wrote, must no longer be thrown toget