During the summer, tourists and locals from Poitiers come together outside the church of Notre-Dame-la-Grande to watch acts of polychromatic illumination on the main facade. It is a spectacle of color and fantasy. The building, which was designed with hundreds of colors, recovers all its glory during the summer evenings. Figures that decorate the facades are brought to life with detail and color. With a single focus they are projected with polychromatic illumination. It is done in 15 minutes with extreme caution and precision. Among the 14 projections, there are two of them that are 'archaeological': .