James Turrell (born in 1943 in Los Angeles) counts among the most important artists of our time. For more than fifty years, he has devoted his creative work to the treatment of (im-)materiality and perception. Like no other, he succeeds in making light as an artistic medium a sensual and spiritual experience. Turrell floods rooms with light that presents itself as gentle seas of color or as an intensely glowing, sometimes diffusely spherical fog of light, taking observers to the limits of their perception. Turrel eliminates the possibility of pinpointing one’s location by means of an object or spatial limits, transmitting a feeling of endlessness. Reduced to perception itself, the onlooker’s gaze almost automatically turns inwards, creating the possibility of self-awareness and self-reflection, meditatively observing one’s own seeing.