Rather than relying on traditional windows, he carefully introduced light through a series of precisely placed architectural features. Horizontal bands of colored glass along the side walls allow filtered, tinted light to enter the chapel. A skylight brings natural light down gently onto the upper edges of the walls, while the roof remains in shadow. Vertical slits provide soft, ambient lighting. Altogether, these techniques reflect Le Corbusier’s intention to make light feel controlled, sacred, and deeply integrated into the spiritual experience of the building.