"A Turrell Skyspace is a specifically proportioned chamber with an aperture in the ceiling open to the sky. Skyspaces can be autonomous structures or integrated into existing architecture. The aperture can be round, ovular or square."
A collection of images and information about James Turrell's skyspaces. According to some online sources there are 82, or as many as 87. As of 5/30/21, 47 are available for viewing on Turrell's official site at jamesturrell.com.
I am working through determining the location of every Skyspace in existence. If you have any tips, please forward to [email protected]. Thanks!