During the Festival of Lights in Lyon, France, the iconic structure that is illuminated is the Basilica of Notre-Dame de Fourvière. This stunning display is part of a larger festival featuring artistic light installations throughout the city. Each evening, the basilica is transformed by vibrant colors and projections, attracting thousands of visitors. This tradition celebrates the heritage and architecture of Lyon, fostering a sense of community pride while providing an enchanting experience as people gather under the illuminated sky.