The Notre Dame Cathedral in Paris has officially reopened, five years after a devastating fire destroyed its roof and spire and threatened the integrity of the entire structure. The reopening ceremony took place on Saturday evening with a two-hour sermon, attended by global leaders and dignitaries. The ceremony also represented the first opportunity to witness the result of the estimated €700 million ($739 million) restoration, a process that included the thorough cleaning of the stone interiors, revealing a glistening white gothic interior.