useums employ different approaches for illuminating works of art, most notably daylight and artificial lighting. The renovation of the National Gallery of Art in Washington, D.C., preserved its natural lighting strategy with a new, more advanced system. The space between the laylights and exterior skylights function to filter and diffuse light before it reaches the galleries below. This system ensures daylight will not damage sensitive works of art. Daylighting reduces the need for artificial illumination and allows works to be shown in true light. NATIONAL GALLERY OF ART WASHINGTON, D.C. M