Full screen Share Close video Inside the World's Longest-Running Construction Project October 22, 2026 Full screen Share Close video Tags·12 b1mtheb1mconstructionarchitectureengineeringthe b1mfred millsbuildingsagradafamíliasagrada famíliabarcelona Share X LinkedIn TB The B1M Watch on YouTube ↗ About this property Comments Members can comment You may request early access. Request early access
