Describir: Robin Evans. <i>The Projective Cast: architecture and its three geometries</i> : Cambridge, Mass., and London: The MIT Press, 1995

  ______     ___      _____     _____     _  _      ___                _____   
 /_   _//   / _ \\   / ____||  |  ___||  | \| ||   / _ \\      ___    |  ___|| 
 `-| |,-   / //\ \\ / //---`'  | ||__    |  ' ||  / //\ \\    /   ||  | ||__   
   | ||   |  ___  ||\ \\___    | ||__    | .  || |  ___  ||  | [] ||  | ||__   
   |_||   |_||  |_|| \_____||  |_____||  |_|\_|| |_||  |_||   \__ ||  |_____|| 
   `-`'   `-`   `-`   `----`   `-----`   `-` -`  `-`   `-`     -|_||  `-----`  
                                                                `-`