To the Editors: David A. Bell in his review of the exhibition “Viollet-le-Duc: Drawing Worlds” at the Bard Graduate Center [ NYR , April 23] writes, “The amazingly rapid reconstruction project [of Notre-Dame, Paris] came to a conclusion in December 2024.” However, walking around the building reveals a vast and active construction site, the cathedral bristling with cranes and scaffolding, surrounded by offices and workshops. While Notre-Dame’s interior has reopened for religious services and to the public, extensive work continues apace. Currently, the flying buttresses of the choir are being restored along with eighty gargoyles and the stained-glass windows at the tribune level. Over the next five years restoration will extend to the three great rose windows of the west, north, and south façades, the flying buttresses of the nave, the west façade towers, and the windows of the nave tribune as well as the choir chapels.…