wherein the notion of light takes on a decidedly religious connotation. (See PBS documentary). His work Meeting (1986) at P.S. 1, which consists of a square room with a rectangular opening cut directly into the ceiling, is a recreation of such a meeting house. In 2013, Turrell created another Quaker skyspace, Greet the Light, at the newly rebuilt Chestnut Hill Friends Meeting in Philadelphia. In a New York Times article on L.A. collectors building skyspaces in their backyards, Jori Finkel describes a skyspace as a "celestial viewing room designed to create the rather magical illusion that the sky is within reach – stretched like a canvas across an opening in the ceiling". In 1992, Turrell's Irish Sky Garden opened at the Liss Ard Estate, Skibbereen, Co Cork, Ireland. The giant earth and stoneworks has a crater at its center. A visitor enters through a doorway in the perimeter of the rim, walks through a passage and climbs stairs to enter, then lies on the central plinth and looks upwards to experience the sky framed by the rim of the crater. "The most important thing is that inside turns into outside and the other way around, in the sense that relationships between the Irish landscape and sky changes" (James Turrell). In 2001, Turrell made a “sky room” and pool for Nora and Norman Stone in Napa Valley, in which visitors swim through a tunnel into the outdoor pool, where an aperture in the roof displays a perfect slice of sky. Since 2009, Turrell's Third Breath, 2005 is part of the permanent exhibition of the Centre for International Light Art (CILA) in Unna, Germany. It is a camera obscura, consisting of two rooms: In the lower, cubic room (Camera Obscura Space), the visitor sees an image of the sky which is being reflected through a lens on the ground. In the upper, cylindrical room (Sky Space), the sky can be seen directly through a hole in the ceiling.Three Gems (2005) at the de Young Museum is Turrell's first Skyspace to adopt the stupa form. At Houghton Hall in Norfolk, the Marquess of Cholmondeley commissioned a folly to the east of the great house. Turrell's Skyspace presents itself from the exterior as an oak-clad building raised on stilts. From the inside of the structure, the viewer's point of view is focused upwards and inevitably lured into contemplating the sky as framed by the