Parisians held a vigil Tuesday night as France continues to mourn the burning of the famed Notre-Dame cathedral. The fire destroyed the cathedral’s spire and its wooden roof, but rescue efforts succeeded in preserving some of the cathedral’s most treasured relics, including the crown of thorns and the tunic of Saint Louis. French President Emmanuel Macron vowed to rebuild Notre-Dame within five years, as donations for the reconstruction effort reached nearly $1 billion. Paris’s prosecutor said the investigation into the cause of the fire, believed to be an accident, will be long and complex. Authorities say they won’t know the full extent of damage to the cathedral until it is cleared as safe for inspectors