Extras
Repairing Notre Dame's Vaults with Underground Quarries
Hidden under Paris is a rich source of limestone, a vast labyrinth of quarry tunnels.
Repairing Notre Dame's Vaults with Underground Quarries
Scientists and engineers fight to save Notre Dame Cathedral after the 2019 fire.
Saving Notre Dame Preview
Saving Notre Dame's Stained Glass Masterpieces
Could the cathedral's beautiful stained glass collection survive the 2019 fire intact?
Saving Notre Dame's Stained Glass Masterpieces
Stabilizing Notre Dame's Famous Buttresses
If the vaulting collapses, the weight of the buttresses will push in the 100-foot walls.