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

News Snapshot:

In 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 together in “a confused and disorderly fashion”, but should be robustly composed of two sturdy rampart walls made of paving stones and plaster. All the aspiring revolutionary needed was a good supply of cobblestones and “a cart filled with sacks of plaster, plus wheelbarrows, handcarts, levers, picks, shovels, mattocks, hammers, cold chisels, trowels, buckets and troughs”. Blanqui advised that all of these things could be...