2019 was the first time since the French Revolution that Notre Dame did not host Christmas services. On Monday, April 15, 2019, just after workers performing roof renovations left for the day, fire broke out. Two hours later, despite the efforts of over 400 firefighters, Notre Dame's iconic 295' tall spire and 859-year old roof collapsed into the 1500°F inferno below, vaporizing 400 tons of lead that had wrapped the roof timbers. Ironically, the fire was most likely caused by either an electrical fault or cigarette butt near the site of the renovation. Fortunately, most of the art and holy relics (including the Crown of Thorns, and the recently-removed rooftop statuary of the twelve apostles) were not damaged or destroyed.
As the estimated cost and time to rebuild balloons beyond $1bn, new concerns arise that restoration may not be possible—at least, not in its original form or construction materials. Reconstruction has focused on excavating the foundation, but this has been complicated by the fact that over 50,000 scaffolding poles (erected before the fire for the roof renovation) were fused together on top of the ancient stone framework.
A number of proposals were made for modernizing the steeple and roof, but the French parliament passed a law requiring reconstruction to "preserve the historic, artistic and architectural history of the monument."